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# UG MEDICAL QUIZ COMPETITION — PRELIMINARY ROUND
## 160 MCQs | 8 Subjects × 20 Questions Each
### Reference Texts: Robbins | Best & Taylor | Gray's | Harper | Jawetz | Katzung | Park | Narayan Reddy

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> **Instructions:** Each question carries 1 mark. No negative marking. Time: 80 minutes. Choose the single best answer.

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# SECTION 1: PATHOLOGY (Robbins)
*Questions 1–20*

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**1.** A 45-year-old male presents with sudden chest pain radiating to the back. Autopsy reveals a tear in the intima of the aorta with blood tracking between the tunica media layers. Histology shows cystic medial necrosis. What is the most likely predisposing condition?

- A) Atherosclerosis
- B) Marfan syndrome
- C) Takayasu arteritis
- D) Polyarteritis nodosa

**Answer: B) Marfan syndrome**

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**2.** A biopsy from the kidney of a patient with systemic lupus erythematosus shows "wire loop" lesions on light microscopy and subendothelial deposits on electron microscopy. This corresponds to which WHO/ISN class of lupus nephritis?

- A) Class I
- B) Class II
- C) Class III
- D) Class IV

**Answer: D) Class IV (Diffuse lupus nephritis)**

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**3.** Congo red staining of cardiac biopsy shows apple-green birefringence under polarized light. Which protein is most likely deposited?

- A) Immunoglobulin light chains (AL amyloid)
- B) Serum amyloid A (AA amyloid)
- C) Transthyretin (ATTR amyloid)
- D) Beta-2 microglobulin

**Answer: C) Transthyretin (ATTR amyloid)** *(most common in senile/cardiac amyloidosis)*

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**4.** A 7-year-old boy develops nephrotic syndrome. Renal biopsy shows normal glomeruli on light microscopy, negative immunofluorescence, and effacement of foot processes on electron microscopy. What is the diagnosis?

- A) Focal segmental glomerulosclerosis
- B) Membranous nephropathy
- C) Minimal change disease
- D) IgA nephropathy

**Answer: C) Minimal change disease**

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**5.** Which oncogene is characteristically amplified in neuroblastoma and correlates with poor prognosis?

- A) RET
- B) N-MYC
- C) BCR-ABL
- D) HER2/NEU

**Answer: B) N-MYC**

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**6.** Reed-Sternberg cells that are CD15+, CD30+, CD45− are characteristic of:

- A) Nodular lymphocyte-predominant Hodgkin lymphoma
- B) Classic Hodgkin lymphoma
- C) Diffuse large B-cell lymphoma
- D) Burkitt lymphoma

**Answer: B) Classic Hodgkin lymphoma**

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**7.** A 60-year-old smoker presents with a hilar mass. Biopsy shows small cells with scant cytoplasm, nuclear molding, and positive chromogranin staining. Which paraneoplastic syndrome is most commonly associated?

- A) Hypercalcemia (PTHrP)
- B) SIADH
- C) Cushing syndrome (ACTH)
- D) Both B and C

**Answer: D) Both B and C** *(Small cell carcinoma → SIADH and ectopic ACTH)*

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**8.** The Philadelphia chromosome (t(9;22)) results in fusion of which two genes?

- A) MYC and IGH
- B) BCL2 and IGH
- C) ABL1 and BCR
- D) PML and RARA

**Answer: C) ABL1 and BCR**

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**9.** A patient with chronic alcoholism develops a macrovesicular steatosis that progresses to Mallory-Denk bodies, neutrophilic infiltration, and hepatocyte ballooning. What is the diagnosis?

- A) Alcoholic fatty liver
- B) Alcoholic hepatitis
- C) Alcoholic cirrhosis
- D) Non-alcoholic steatohepatitis

**Answer: B) Alcoholic hepatitis**

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**10.** Psammoma bodies are characteristically seen in all of the following EXCEPT:

- A) Papillary carcinoma of the thyroid
- B) Serous cystadenocarcinoma of the ovary
- C) Meningioma
- D) Follicular carcinoma of the thyroid

**Answer: D) Follicular carcinoma of the thyroid**

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**11.** A patient presents with painful oral ulcers, skin vesicles, and positive Nikolsky sign. Histology shows acantholysis in the suprabasal layer. Immunofluorescence shows IgG in a "fishnet" pattern. What is the diagnosis?

- A) Bullous pemphigoid
- B) Pemphigus vulgaris
- C) Dermatitis herpetiformis
- D) Stevens-Johnson syndrome

**Answer: B) Pemphigus vulgaris**

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**12.** Which type of necrosis is characteristic of tuberculosis?

- A) Liquefactive necrosis
- B) Coagulative necrosis
- C) Caseous necrosis
- D) Fat necrosis

**Answer: C) Caseous necrosis**

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**13.** A 35-year-old woman with chronic hypertension develops preeclampsia. Placental biopsy shows "acute atherosis." This represents which type of vascular change?

- A) Fibrinoid necrosis of spiral arteries
- B) Hyaline arteriolosclerosis
- C) Hyperplastic arteriolosclerosis
- D) Monckeberg medial calcification

**Answer: A) Fibrinoid necrosis of spiral arteries**

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**14.** The pathological hallmark of Alzheimer's disease includes all of the following EXCEPT:

- A) Neuritic (senile) plaques containing Aβ42
- B) Neurofibrillary tangles (hyperphosphorylated tau)
- C) Lewy bodies
- D) Granulovacuolar degeneration

**Answer: C) Lewy bodies** *(Lewy bodies are hallmark of Parkinson's/Lewy body dementia)*

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**15.** Which tumor marker is most specifically elevated in hepatocellular carcinoma?

- A) CEA
- B) CA 19-9
- C) Alpha-fetoprotein (AFP)
- D) CA-125

**Answer: C) Alpha-fetoprotein (AFP)**

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**16.** A young male presents with bilateral hilar lymphadenopathy, uveitis, and elevated serum ACE. Lung biopsy shows non-caseating granulomas. The most likely diagnosis is:

- A) Tuberculosis
- B) Sarcoidosis
- C) Histoplasmosis
- D) Wegener's granulomatosis

**Answer: B) Sarcoidosis**

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**17.** Which type of hypersensitivity reaction is responsible for anaphylaxis?

- A) Type I (IgE-mediated)
- B) Type II (cytotoxic)
- C) Type III (immune complex)
- D) Type IV (cell-mediated)

**Answer: A) Type I (IgE-mediated)**

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**18.** Dystrophic calcification differs from metastatic calcification in that:

- A) Dystrophic calcification occurs in normal tissue with abnormal calcium metabolism
- B) Dystrophic calcification occurs in dead/damaged tissue with normal serum calcium
- C) Metastatic calcification occurs only in malignant tumors
- D) Dystrophic calcification requires elevated serum phosphate

**Answer: B) Dystrophic calcification occurs in dead/damaged tissue with normal serum calcium**

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**19.** A 50-year-old male presents with progressive dysphagia, first to solids then liquids. Endoscopy shows a mid-esophageal ulcerating mass. The most common histological type in the middle third of the esophagus is:

- A) Adenocarcinoma
- B) Squamous cell carcinoma
- C) Small cell carcinoma
- D) Leiomyosarcoma

**Answer: B) Squamous cell carcinoma**

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**20.** Michaelis-Gutmann bodies are seen in:

- A) Granuloma inguinale
- B) Malakoplakia
- C) Xanthogranulomatous pyelonephritis
- D) Wegener's granulomatosis

**Answer: B) Malakoplakia**

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# SECTION 2: PHYSIOLOGY (Best & Taylor)
*Questions 21–40*

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**21.** The Frank-Starling law of the heart states that:

- A) Heart rate is the primary determinant of cardiac output
- B) Stroke volume increases with increased preload (end-diastolic volume)
- C) Cardiac output decreases with increased afterload
- D) Myocardial contractility is independent of fiber length

**Answer: B) Stroke volume increases with increased preload (end-diastolic volume)**

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**22.** During a normal cardiac cycle, the mitral valve closes at the beginning of:

- A) Isovolumetric relaxation
- B) Rapid ejection
- C) Isovolumetric contraction
- D) Atrial systole

**Answer: C) Isovolumetric contraction**

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**23.** The oxygen-hemoglobin dissociation curve shifts to the RIGHT in all of the following conditions EXCEPT:

- A) Increased PCO2
- B) Increased temperature
- C) Increased 2,3-DPG
- D) Increased pH (alkalosis)

**Answer: D) Increased pH (alkalosis)** *(Alkalosis causes LEFT shift)*

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**24.** The primary stimulus for erythropoietin secretion is:

- A) Decreased hemoglobin concentration
- B) Decreased renal oxygen delivery (hypoxia)
- C) Increased serum iron
- D) Increased blood viscosity

**Answer: B) Decreased renal oxygen delivery (hypoxia)**

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**25.** Cerebrospinal fluid (CSF) is primarily produced by:

- A) Arachnoid villi
- B) Choroid plexus of the lateral ventricles
- C) Ependymal cells lining the spinal cord
- D) Cerebral capillary endothelium

**Answer: B) Choroid plexus of the lateral ventricles**

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**26.** A patient has a plasma osmolality of 310 mOsm/kg with urine osmolality of 50 mOsm/kg despite fluid restriction. This pattern is consistent with:

- A) Syndrome of inappropriate ADH secretion (SIADH)
- B) Central diabetes insipidus
- C) Nephrogenic diabetes insipidus
- D) Psychogenic polydipsia

**Answer: C) Nephrogenic diabetes insipidus** *(No response to fluid restriction or ADH)*

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**27.** The juxtaglomerular apparatus releases renin in response to all of the following EXCEPT:

- A) Decreased renal perfusion pressure
- B) Decreased NaCl delivery to the macula densa
- C) Sympathetic stimulation (β1)
- D) Increased atrial natriuretic peptide (ANP)

**Answer: D) Increased atrial natriuretic peptide (ANP)** *(ANP inhibits renin release)*

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**28.** During exercise, which of the following changes occurs in active skeletal muscle?

- A) Vasoconstriction due to sympathetic stimulation
- B) Vasodilation due to local metabolite accumulation (CO2, H+, K+, adenosine)
- C) Decreased oxygen extraction from capillary blood
- D) Decreased capillary recruitment

**Answer: B) Vasodilation due to local metabolite accumulation**

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**29.** The P wave of the ECG represents:

- A) Ventricular depolarization
- B) Atrial depolarization
- C) Atrial repolarization
- D) Ventricular repolarization

**Answer: B) Atrial depolarization**

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**30.** Which lung volume CANNOT be measured by spirometry alone?

- A) Tidal volume
- B) Expiratory reserve volume
- C) Residual volume
- D) Inspiratory reserve volume

**Answer: C) Residual volume** *(Requires helium dilution or body plethysmography)*

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**31.** The Hering-Breuer reflex involves:

- A) Chemoreceptor response to hypoxia
- B) Stretch receptor-mediated inhibition of further inspiration
- C) Baroreceptor response to hypertension
- D) Proprioceptor-mediated increase in ventilation

**Answer: B) Stretch receptor-mediated inhibition of further inspiration**

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**32.** Secretin is released from S cells of the duodenum in response to:

- A) Proteins in the duodenum
- B) Fats in the duodenum
- C) Acid (low pH) in the duodenum
- D) Distension of the stomach

**Answer: C) Acid (low pH) in the duodenum**

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**33.** In a patient with primary hyperaldosteronism, which combination of findings is expected?

- A) Hyponatremia, hyperkalemia, metabolic acidosis
- B) Hypernatremia, hypokalemia, metabolic alkalosis
- C) Hyponatremia, hypokalemia, metabolic alkalosis
- D) Hypernatremia, hyperkalemia, metabolic acidosis

**Answer: B) Hypernatremia, hypokalemia, metabolic alkalosis**

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**34.** The resting membrane potential of a typical neuron (−70 mV) is primarily maintained by:

- A) The sodium-potassium ATPase pump alone
- B) High resting permeability to K+ and low permeability to Na+
- C) High resting permeability to Na+ and low permeability to K+
- D) Active chloride transport

**Answer: B) High resting permeability to K+ and low permeability to Na+**

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**35.** Which receptor type is responsible for the increase in heart rate during the fight-or-flight response?

- A) α1-adrenergic receptors
- B) β1-adrenergic receptors
- C) M2-muscarinic receptors
- D) β2-adrenergic receptors

**Answer: B) β1-adrenergic receptors**

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**36.** Spermatogenesis is maintained by which hormone acting directly on Sertoli cells?

- A) LH
- B) FSH
- C) Testosterone (from Leydig cells)
- D) Both B and C

**Answer: D) Both B and C** *(FSH acts on Sertoli cells; testosterone from Leydig cells is also essential)*

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**37.** The primary site of glucose absorption in the intestine involves which transporter on the apical surface of enterocytes?

- A) GLUT5
- B) GLUT2
- C) SGLT1 (sodium-glucose co-transporter)
- D) GLUT4

**Answer: C) SGLT1**

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**38.** Glucagon secreted from alpha cells of the islets of Langerhans primarily acts on which organ?

- A) Muscle
- B) Adipose tissue
- C) Liver
- D) Kidney

**Answer: C) Liver** *(Promotes glycogenolysis and gluconeogenesis)*

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**39.** Dead space ventilation is best described as:

- A) Alveoli that are ventilated but not perfused
- B) Alveoli that are perfused but not ventilated
- C) Areas with low V/Q ratio
- D) Bronchi involved in gas exchange

**Answer: A) Alveoli that are ventilated but not perfused**

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**40.** The gold standard test for GFR measurement uses:

- A) Creatinine clearance
- B) Urea clearance
- C) Inulin clearance
- D) PAH clearance

**Answer: C) Inulin clearance**

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# SECTION 3: ANATOMY (Gray's)
*Questions 41–60*

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**41.** The foramen of Winslow (epiploic foramen) forms the communication between:

- A) Greater and lesser sacs of the peritoneum
- B) Peritoneal cavity and retroperitoneum
- C) Duodenum and stomach
- D) Lesser sac and left paracolic gutter

**Answer: A) Greater and lesser sacs of the peritoneum**

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**42.** Winging of the scapula is caused by paralysis of which muscle?

- A) Trapezius
- B) Rhomboid major
- C) Serratus anterior
- D) Levator scapulae

**Answer: C) Serratus anterior** *(Supplied by long thoracic nerve)*

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**43.** The artery of Adamkiewicz (arteria radicularis magna) most commonly arises from:

- A) T1–T4 intercostal arteries
- B) T9–L2 intercostal/lumbar arteries
- C) Vertebral artery
- D) Posterior spinal artery

**Answer: B) T9–L2 intercostal/lumbar arteries**

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**44.** Which nerve is responsible for the "claw hand" deformity?

- A) Median nerve
- B) Radial nerve
- C) Ulnar nerve
- D) Musculocutaneous nerve

**Answer: C) Ulnar nerve** *(Paralysis of intrinsic muscles of the hand)*

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**45.** The inguinal (Hesselbach's) triangle is bounded by:

- A) Inguinal ligament inferiorly, inferior epigastric vessels laterally, rectus abdominis medially
- B) Inguinal ligament superiorly, femoral vessels laterally, inguinal canal medially
- C) External oblique medially, internal oblique laterally, inguinal ligament inferiorly
- D) Conjoint tendon superiorly, lacunar ligament medially, femoral nerve laterally

**Answer: A) Inguinal ligament inferiorly, inferior epigastric vessels laterally, rectus abdominis medially**

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**46.** The primary lymphatic drainage of the testis is to:

- A) Inguinal lymph nodes
- B) Iliac lymph nodes
- C) Para-aortic (lumbar) lymph nodes
- D) Pelvic lymph nodes

**Answer: C) Para-aortic (lumbar) lymph nodes** *(Testis descends from retroperitoneum)*

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**47.** Damage to the posterior cord of the brachial plexus results in loss of function of which nerves?

- A) Median and ulnar nerves
- B) Axillary and radial nerves
- C) Musculocutaneous and median nerves
- D) Ulnar and radial nerves

**Answer: B) Axillary and radial nerves**

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**48.** The vocal cords are attached anteriorly to the:

- A) Arytenoid cartilage
- B) Cricoid cartilage
- C) Thyroid cartilage (thyroid angle)
- D) Epiglottis

**Answer: C) Thyroid cartilage (thyroid angle)**

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**49.** Which structure passes through the carpal tunnel?

- A) Ulnar nerve
- B) Radial artery
- C) Median nerve and flexor tendons
- D) Flexor carpi radialis tendon

**Answer: C) Median nerve and flexor tendons**

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**50.** The femoral triangle is bounded by:

- A) Sartorius (laterally), adductor longus (medially), inguinal ligament (superiorly)
- B) Quadriceps (superiorly), hamstrings (posteriorly), inguinal ligament (anteriorly)
- C) Iliacus (laterally), psoas major (medially), femoral nerve (base)
- D) Gracilis (medially), rectus femoris (laterally), pubic ramus (superiorly)

**Answer: A) Sartorius (laterally), adductor longus (medially), inguinal ligament (superiorly)**

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**51.** The Circle of Willis receives contributions from all of the following EXCEPT:

- A) Internal carotid arteries
- B) Anterior communicating artery
- C) Posterior communicating arteries
- D) External carotid arteries

**Answer: D) External carotid arteries**

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**52.** Trendelenburg's gait (positive Trendelenburg sign) results from weakness of which muscle?

- A) Adductor magnus
- B) Gluteus maximus
- C) Gluteus medius
- D) Quadriceps femoris

**Answer: C) Gluteus medius** *(Supplied by superior gluteal nerve)*

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**53.** The ureter is crossed anteriorly by which structure at the pelvic brim in females?

- A) Uterine artery
- B) Internal iliac artery
- C) Ovarian artery
- D) Round ligament of uterus

**Answer: C) Ovarian artery**

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**54.** The recurrent laryngeal nerve is a branch of:

- A) Glossopharyngeal nerve (CN IX)
- B) External branch of superior laryngeal nerve
- C) Vagus nerve (CN X)
- D) Hypoglossal nerve (CN XII)

**Answer: C) Vagus nerve (CN X)**

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**55.** The "anatomical snuffbox" is bounded by tendons of:

- A) Extensor pollicis longus (medially) and Extensor pollicis brevis + Abductor pollicis longus (laterally)
- B) Flexor pollicis longus and Extensor pollicis brevis
- C) Abductor pollicis longus and Flexor pollicis brevis
- D) Extensor carpi radialis and Extensor carpi ulnaris

**Answer: A) Extensor pollicis longus (medially) and EPB + APL (laterally)**

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**56.** The coronary sinus drains into the:

- A) Right ventricle
- B) Left atrium
- C) Right atrium
- D) Superior vena cava

**Answer: C) Right atrium**

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**57.** Erb's palsy involves damage to which nerve roots?

- A) C8, T1
- B) C5, C6
- C) C6, C7
- D) C7, C8

**Answer: B) C5, C6** *(Upper trunk of brachial plexus — "waiter's tip" deformity)*

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**58.** The porta hepatis transmits all of the following EXCEPT:

- A) Portal vein
- B) Hepatic artery proper
- C) Common hepatic duct
- D) Hepatic veins

**Answer: D) Hepatic veins** *(Hepatic veins exit posteriorly into the IVC)*

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**59.** The muscle responsible for plantarflexion AND inversion of the foot (used as test for tibial nerve) is:

- A) Peroneus longus
- B) Tibialis posterior
- C) Extensor digitorum longus
- D) Gastrocnemius

**Answer: B) Tibialis posterior**

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**60.** The epididymis is connected to the testis and receives spermatozoa via the:

- A) Ductus deferens
- B) Efferent ductules (ductuli efferentes)
- C) Seminiferous tubules directly
- D) Rete testis only

**Answer: B) Efferent ductules (ductuli efferentes)**

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# SECTION 4: BIOCHEMISTRY (Harper)
*Questions 61–80*

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**61.** The committed step (rate-limiting enzyme) in glycolysis is:

- A) Hexokinase
- B) Phosphofructokinase-1 (PFK-1)
- C) Pyruvate kinase
- D) Phosphoglycerate kinase

**Answer: B) Phosphofructokinase-1 (PFK-1)**

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**62.** Glucose-6-phosphate dehydrogenase (G6PD) deficiency leads to hemolytic anemia because:

- A) It impairs glycolysis, reducing ATP in RBCs
- B) It reduces NADPH production, impairing glutathione regeneration and increasing oxidative stress
- C) It prevents glucose entry into RBCs
- D) It causes accumulation of glucose-6-phosphate that is toxic to RBCs

**Answer: B) It reduces NADPH production, impairing glutathione regeneration**

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**63.** Which enzyme is deficient in Gaucher's disease?

- A) Hexosaminidase A
- B) Glucocerebrosidase (acid β-glucosidase)
- C) Sphingomyelinase
- D) α-Galactosidase A

**Answer: B) Glucocerebrosidase (acid β-glucosidase)**

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**64.** The urea cycle takes place in:

- A) Cytoplasm only
- B) Mitochondria only
- C) Both mitochondria and cytoplasm
- D) Endoplasmic reticulum

**Answer: C) Both mitochondria and cytoplasm** *(First two steps in mitochondria, rest in cytoplasm)*

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**65.** Hyperhomocysteinemia as a risk factor for cardiovascular disease results from deficiency of which vitamins?

- A) Vitamins A and D
- B) Vitamins B6, B12, and folate
- C) Vitamins C and E
- D) Vitamins B1 and B2

**Answer: B) Vitamins B6, B12, and folate**

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**66.** The enzyme that converts HMG-CoA to mevalonate (rate-limiting step of cholesterol synthesis) is:

- A) HMG-CoA synthase
- B) Squalene synthase
- C) HMG-CoA reductase
- D) Lanosterol synthase

**Answer: C) HMG-CoA reductase** *(Target of statins)*

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**67.** Which transport protein carries cholesterol from peripheral tissues back to the liver (reverse cholesterol transport)?

- A) LDL
- B) VLDL
- C) HDL
- D) Chylomicrons

**Answer: C) HDL**

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**68.** Phenylketonuria (PKU) results from deficiency of:

- A) Tyrosinase
- B) Homogentisate oxidase
- C) Phenylalanine hydroxylase
- D) Fumarylacetoacetase

**Answer: C) Phenylalanine hydroxylase**

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**69.** The Cori cycle involves:

- A) Transfer of fatty acids from adipose tissue to liver
- B) Recycling of lactate from muscle to glucose in the liver
- C) Amino acid transport between muscle and liver
- D) Ketone body utilization in the brain

**Answer: B) Recycling of lactate from muscle to glucose in the liver**

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**70.** In DNA replication, the enzyme that synthesizes the RNA primer is:

- A) DNA polymerase I
- B) DNA polymerase III
- C) Primase (RNA polymerase)
- D) Helicase

**Answer: C) Primase (RNA polymerase)**

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**71.** Vitamin K is required as a cofactor for which post-translational modification?

- A) Hydroxylation of proline and lysine (collagen synthesis)
- B) Carboxylation of glutamate residues in coagulation factors II, VII, IX, X
- C) Phosphorylation of serine residues
- D) Acetylation of histone proteins

**Answer: B) Carboxylation of glutamate residues in coagulation factors II, VII, IX, X**

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**72.** Which base is found in RNA but NOT in DNA?

- A) Cytosine
- B) Adenine
- C) Uracil
- D) Guanine

**Answer: C) Uracil**

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**73.** Scurvy results from deficiency of Vitamin C, which impairs:

- A) Collagen synthesis (hydroxylation of proline and lysine)
- B) Fatty acid oxidation
- C) Heme synthesis
- D) DNA repair mechanisms

**Answer: A) Collagen synthesis (hydroxylation of proline and lysine)**

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**74.** The enzyme deficient in Lesch-Nyhan syndrome is:

- A) Adenosine deaminase
- B) Hypoxanthine-guanine phosphoribosyltransferase (HGPRT)
- C) Purine nucleoside phosphorylase
- D) Xanthine oxidase

**Answer: B) HGPRT**

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**75.** Which type of RNA carries the genetic code from the nucleus to ribosomes?

- A) rRNA
- B) tRNA
- C) mRNA
- D) snRNA

**Answer: C) mRNA**

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**76.** β-Oxidation of fatty acids occurs in the:

- A) Cytoplasm
- B) Endoplasmic reticulum
- C) Mitochondrial matrix
- D) Peroxisomes (for very long-chain fatty acids)

**Answer: C) Mitochondrial matrix** *(Standard β-oxidation; VLCFA uses peroxisomes first)*

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**77.** The key enzyme activated in glycogen synthesis is:

- A) Glycogen phosphorylase
- B) Glycogen synthase
- C) Phosphorylase kinase
- D) Debranching enzyme

**Answer: B) Glycogen synthase**

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**78.** Biotin acts as a coenzyme for which class of reactions?

- A) Deamination
- B) Transamination
- C) Carboxylation
- D) Oxidative decarboxylation

**Answer: C) Carboxylation** *(e.g., pyruvate carboxylase, acetyl-CoA carboxylase)*

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**79.** Which lipoprotein has the highest triglyceride content?

- A) LDL
- B) HDL
- C) Chylomicrons
- D) IDL

**Answer: C) Chylomicrons**

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**80.** The "P/O ratio" in oxidative phosphorylation refers to:

- A) The ratio of phosphate ions to oxygen molecules consumed
- B) ATP produced per atom of oxygen consumed (moles ATP per ½ O2)
- C) The protein-to-oxygen binding ratio in hemoglobin
- D) The ratio of NADH to FADH2 produced in the TCA cycle

**Answer: B) ATP produced per atom of oxygen consumed (moles ATP per ½ O2)**

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# SECTION 5: MICROBIOLOGY (Jawetz)
*Questions 81–100*

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**81.** The "quellung reaction" (capsular swelling) is used to identify which organism?

- A) Staphylococcus aureus
- B) Streptococcus pneumoniae
- C) Haemophilus influenzae
- D) Neisseria meningitidis

**Answer: B) Streptococcus pneumoniae**

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**82.** Which hepatitis virus is transmitted via the fecal-oral route and does NOT cause chronic infection?

- A) Hepatitis B
- B) Hepatitis C
- C) Hepatitis D
- D) Hepatitis E

**Answer: D) Hepatitis E** *(Fecal-oral; no chronicity; dangerous in pregnancy)*

---

**83.** The Weil-Felix reaction uses Proteus antigens to detect antibodies against:

- A) Borrelia burgdorferi
- B) Rickettsia species
- C) Leptospira interrogans
- D) Treponema pallidum

**Answer: B) Rickettsia species**

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**84.** The toxin of Clostridium botulinum causes paralysis by:

- A) Blocking acetylcholinesterase (irreversibly)
- B) Cleaving SNARE proteins, preventing ACh release at NMJ
- C) Opening chloride channels, causing hyperpolarization
- D) Stimulating excess ACh release

**Answer: B) Cleaving SNARE proteins, preventing ACh release at NMJ**

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**85.** Germ tube formation at 37°C in serum is characteristic of:

- A) Aspergillus fumigatus
- B) Candida tropicalis
- C) Candida albicans
- D) Cryptococcus neoformans

**Answer: C) Candida albicans**

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**86.** The CAMP test is positive for which organism?

- A) Streptococcus pyogenes (Group A)
- B) Streptococcus agalactiae (Group B)
- C) Enterococcus faecalis
- D) Streptococcus pneumoniae

**Answer: B) Streptococcus agalactiae (Group B)**

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**87.** Which of the following viruses uses reverse transcriptase?

- A) Influenza virus
- B) Adenovirus
- C) HIV (Human Immunodeficiency Virus)
- D) Poliovirus

**Answer: C) HIV**

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**88.** India ink preparation is used to visualize the capsule of:

- A) Klebsiella pneumoniae
- B) Cryptococcus neoformans
- C) Candida albicans
- D) Aspergillus niger

**Answer: B) Cryptococcus neoformans**

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**89.** "Sulfur granules" are characteristic of which infection?

- A) Nocardia asteroides
- B) Actinomyces israelii
- C) Mycetoma due to Madurella
- D) Both A and B

**Answer: B) Actinomyces israelii** *(True sulfur granules in soft tissue actinomycosis)*

---

**90.** The Elek test detects:

- A) Streptolysin O
- B) Diphtheria toxin production by Corynebacterium diphtheriae
- C) Botulinum toxin
- D) Exfoliative toxin of Staphylococcus aureus

**Answer: B) Diphtheria toxin production by Corynebacterium diphtheriae**

---

**91.** The pathognomonic cytopathic effect (CPE) of CMV (Cytomegalovirus) in infected cells is:

- A) Negri bodies
- B) Owl-eye intranuclear inclusions
- C) Cowdry type A inclusions only
- D) Warthin-Finkeldey giant cells

**Answer: B) Owl-eye intranuclear inclusions**

---

**92.** The Vi antigen of Salmonella typhi is a:

- A) Flagellar (H) antigen
- B) Somatic (O) antigen
- C) Capsular polysaccharide antigen
- D) Fimbrial antigen

**Answer: C) Capsular polysaccharide antigen**

---

**93.** Donovan bodies (intracellular inclusions in macrophages) are diagnostic of:

- A) Chancroid (Haemophilus ducreyi)
- B) Granuloma inguinale (Klebsiella granulomatis)
- C) Lymphogranuloma venereum
- D) Primary syphilis

**Answer: B) Granuloma inguinale (Klebsiella granulomatis)**

---

**94.** Which drug specifically inhibits mycobacterial RNA polymerase?

- A) Isoniazid
- B) Rifampicin
- C) Ethambutol
- D) Pyrazinamide

**Answer: B) Rifampicin**

---

**95.** The darkfield microscopy is used for detection of:

- A) Mycobacterium tuberculosis
- B) Treponema pallidum
- C) Neisseria gonorrhoeae
- D) Chlamydia trachomatis

**Answer: B) Treponema pallidum** *(Too thin to see on Gram stain)*

---

**96.** Negri bodies are found in neurons infected with:

- A) Herpes simplex virus
- B) Rabies virus
- C) Measles virus
- D) Japanese encephalitis virus

**Answer: B) Rabies virus**

---

**97.** The most common cause of urinary tract infections is:

- A) Staphylococcus saprophyticus
- B) Klebsiella pneumoniae
- C) Escherichia coli
- D) Enterococcus faecalis

**Answer: C) Escherichia coli**

---

**98.** Bacteria that are catalase positive and coagulase positive include:

- A) Streptococcus pyogenes
- B) Staphylococcus aureus
- C) Staphylococcus epidermidis
- D) Enterococcus faecalis

**Answer: B) Staphylococcus aureus**

---

**99.** The mechanism of action of penicillin involves:

- A) Inhibition of 30S ribosomal subunit
- B) Inhibition of cell membrane ergosterol synthesis
- C) Inhibition of transpeptidase (PBP), preventing peptidoglycan cross-linking
- D) Inhibition of DNA gyrase

**Answer: C) Inhibition of transpeptidase (PBP), preventing peptidoglycan cross-linking**

---

**100.** Koplik spots on buccal mucosa are pathognomonic of:

- A) Rubella
- B) Varicella
- C) Measles (Rubeola)
- D) Roseola infantum

**Answer: C) Measles (Rubeola)**

---

# SECTION 6: PHARMACOLOGY (Katzung)
*Questions 101–120*

---

**101.** The drug of choice for status epilepticus in the acute emergency setting is:

- A) Phenytoin IV
- B) Valproic acid IV
- C) Lorazepam (benzodiazepine) IV
- D) Phenobarbital IV

**Answer: C) Lorazepam (benzodiazepine) IV**

---

**102.** Warfarin acts by inhibiting:

- A) Thrombin directly
- B) Factor Xa directly
- C) Vitamin K epoxide reductase (VKOR), impairing synthesis of factors II, VII, IX, X
- D) Platelet aggregation via COX inhibition

**Answer: C) Vitamin K epoxide reductase (VKOR)**

---

**103.** The drug that causes "cheese reaction" (hypertensive crisis) when taken with tyramine-rich foods is:

- A) Selective serotonin reuptake inhibitors (SSRIs)
- B) Monoamine oxidase inhibitors (MAOIs)
- C) Tricyclic antidepressants
- D) Lithium

**Answer: B) Monoamine oxidase inhibitors (MAOIs)**

---

**104.** Neostigmine reverses non-depolarizing neuromuscular blockade by:

- A) Directly competing with curare at nicotinic receptors
- B) Inhibiting acetylcholinesterase, increasing ACh at the NMJ
- C) Stimulating nicotinic receptors directly
- D) Releasing ACh from presynaptic terminals

**Answer: B) Inhibiting acetylcholinesterase, increasing ACh at the NMJ**

---

**105.** The therapeutic index (TI) is calculated as:

- A) ED50 / LD50
- B) LD50 / ED50
- C) Maximum effect / Minimum dose
- D) Cmax / Tmax

**Answer: B) LD50 / ED50** *(Higher TI = safer drug)*

---

**106.** Which anti-TB drug requires pyridoxine (Vitamin B6) supplementation to prevent peripheral neuropathy?

- A) Rifampicin
- B) Ethambutol
- C) Isoniazid
- D) Pyrazinamide

**Answer: C) Isoniazid**

---

**107.** Propranolol is contraindicated in patients with:

- A) Hypertension
- B) Angina pectoris
- C) Bronchial asthma
- D) Supraventricular tachycardia

**Answer: C) Bronchial asthma** *(β2 blockade causes bronchoconstriction)*

---

**108.** The mechanism of antifungal action of fluconazole is:

- A) Binding to ergosterol, forming pores in the fungal membrane
- B) Inhibition of β-1,3-glucan synthase
- C) Inhibition of lanosterol 14α-demethylase (CYP51), blocking ergosterol synthesis
- D) Inhibition of fungal dihydrofolate reductase

**Answer: C) Inhibition of lanosterol 14α-demethylase (CYP51)**

---

**109.** Digoxin toxicity is worsened by:

- A) Hyperkalemia
- B) Hypokalemia
- C) Hypermagnesemia
- D) Hypernatremia

**Answer: B) Hypokalemia** *(K+ competes with digoxin at Na+/K+ ATPase)*

---

**110.** The drug used in organophosphate (nerve agent) poisoning that reverses muscarinic effects is:

- A) Pralidoxime (2-PAM) alone
- B) Atropine alone
- C) Atropine + Pralidoxime
- D) Physostigmine

**Answer: C) Atropine + Pralidoxime** *(Atropine for muscarinic symptoms; 2-PAM to reactivate AChE before aging)*

---

**111.** The "first-pass effect" refers to:

- A) Initial distribution of drug to highly perfused organs
- B) Extensive pre-systemic metabolism of orally administered drug by the liver and gut wall before reaching systemic circulation
- C) Renal excretion of drug on first pass through the kidney
- D) Drug binding to plasma proteins on first exposure

**Answer: B) Extensive pre-systemic metabolism of orally administered drug**

---

**112.** Which drug class is associated with Stevens-Johnson syndrome and toxic epidermal necrolysis?

- A) Aminoglycosides
- B) Sulfonamides and anticonvulsants (carbamazepine, phenytoin)
- C) Macrolide antibiotics
- D) Loop diuretics

**Answer: B) Sulfonamides and anticonvulsants**

---

**113.** Metformin's primary mechanism of action in type 2 diabetes is:

- A) Stimulation of insulin secretion from β cells
- B) Activation of AMPK, reducing hepatic gluconeogenesis
- C) Inhibition of α-glucosidase in the intestine
- D) Increased glucose uptake in skeletal muscle via GLUT4

**Answer: B) Activation of AMPK, reducing hepatic gluconeogenesis**

---

**114.** Which diuretic acts on the thick ascending limb of the loop of Henle by inhibiting Na-K-2Cl cotransporter?

- A) Hydrochlorothiazide
- B) Spironolactone
- C) Furosemide
- D) Acetazolamide

**Answer: C) Furosemide**

---

**115.** Zero-order kinetics in pharmacology means:

- A) Drug is eliminated at a rate proportional to its plasma concentration
- B) A constant amount of drug is eliminated per unit time regardless of concentration
- C) Drug is not metabolized at all
- D) Drug has zero bioavailability

**Answer: B) A constant amount of drug is eliminated per unit time regardless of concentration**

---

**116.** The drug of choice for Pneumocystis jirovecii pneumonia (PCP) is:

- A) Amphotericin B
- B) Trimethoprim-sulfamethoxazole (TMP-SMX)
- C) Fluconazole
- D) Caspofungin

**Answer: B) Trimethoprim-sulfamethoxazole (TMP-SMX)**

---

**117.** Aspirin irreversibly inhibits:

- A) COX-2 only
- B) Phospholipase A2
- C) Both COX-1 and COX-2 by acetylation
- D) Thromboxane synthase selectively

**Answer: C) Both COX-1 and COX-2 by acetylation**

---

**118.** The antidote for acetaminophen (paracetamol) overdose is:

- A) Activated charcoal
- B) N-acetylcysteine (NAC)
- C) Sodium bicarbonate
- D) Deferoxamine

**Answer: B) N-acetylcysteine (NAC)**

---

**119.** Which drug inhibits HER2 (ErbB2) tyrosine kinase receptor in breast cancer?

- A) Imatinib
- B) Rituximab
- C) Trastuzumab (Herceptin)
- D) Cetuximab

**Answer: C) Trastuzumab (Herceptin)**

---

**120.** Lithium toxicity is worsened by:

- A) High sodium diet
- B) Increased fluid intake
- C) NSAIDs and thiazide diuretics (increase lithium reabsorption)
- D) Caffeine consumption

**Answer: C) NSAIDs and thiazide diuretics**

---

# SECTION 7: COMMUNITY MEDICINE (Park)
*Questions 121–140*

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**121.** The Reproductive and Child Health (RCH) Programme in India replaced which earlier programme?

- A) National Family Welfare Programme
- B) Child Survival and Safe Motherhood (CSSM) Programme
- C) Universal Immunization Programme
- D) Integrated Child Development Services (ICDS)

**Answer: B) Child Survival and Safe Motherhood (CSSM) Programme** *(RCH-I launched 1997)*

---

**122.** Sensitivity of a diagnostic test is best defined as:

- A) Ability to correctly identify those without the disease (true negative rate)
- B) Ability to correctly identify those with the disease (true positive rate)
- C) Proportion of positive tests that are true positives
- D) Proportion of negative tests that are true negatives

**Answer: B) Ability to correctly identify those with the disease (true positive rate)**

---

**123.** The "Iceberg phenomenon" in community medicine refers to:

- A) Visible disease cases exceeding submerged subclinical cases
- B) The larger submerged proportion of subclinical, undiagnosed, or undetected cases below the visible tip of diagnosed cases
- C) Cold chain maintenance failures in immunization programs
- D) Hidden malnutrition in apparently well-nourished populations

**Answer: B) Larger proportion of subclinical/undiagnosed cases below diagnosed cases**

---

**124.** Under India's National Immunization Schedule (NIS), the Pentavalent vaccine protects against which combination?

- A) DPT + Hepatitis B + Hib
- B) DPT + Polio + Hib
- C) DPT + Hepatitis B + MMR
- D) BCG + DPT + Hepatitis B

**Answer: A) DPT + Hepatitis B + Hib**

---

**125.** The Apgar score is assessed at 1 minute and 5 minutes. A score of 7–10 indicates:

- A) Severe asphyxia requiring immediate resuscitation
- B) Moderate asphyxia
- C) Normal condition / good condition
- D) Mild asphyxia requiring stimulation

**Answer: C) Normal condition / good condition**

---

**126.** The standard case definition of Severe Acute Malnutrition (SAM) in children under 5 years uses which criterion?

- A) Weight-for-height Z score < −2 SD (WHZ < −2)
- B) Weight-for-age Z score < −3 SD OR MUAC < 11.5 cm OR bilateral pitting edema
- C) MUAC < 12.5 cm alone
- D) BMI < 14 kg/m²

**Answer: B) WHZ < −3 SD OR MUAC < 11.5 cm OR bilateral pitting edema**

---

**127.** The denominator used for calculating the Infant Mortality Rate (IMR) is:

- A) Mid-year population
- B) Total live births in the same year
- C) Total births (live + still)
- D) Women of reproductive age

**Answer: B) Total live births in the same year**

---

**128.** Random sampling error decreases as:

- A) Sample size decreases
- B) Sample size increases
- C) Bias increases
- D) The study becomes retrospective

**Answer: B) Sample size increases**

---

**129.** John Snow's investigation of the Broad Street pump cholera epidemic (1854) is a classic example of:

- A) Case-control study
- B) Randomized controlled trial
- C) Descriptive epidemiology and field investigation
- D) Cohort study

**Answer: C) Descriptive epidemiology and field investigation**

---

**130.** The concept of "herd immunity" (community immunity) is achieved when:

- A) All individuals in a community are vaccinated
- B) A sufficient proportion of the population is immune, preventing spread to susceptible individuals
- C) All susceptible individuals are treated with prophylactic antibiotics
- D) The pathogen mutates to a less virulent form

**Answer: B) Sufficient proportion is immune, preventing spread to susceptibles**

---

**131.** The COPCORD methodology (Community Oriented Program for Control of Rheumatic Diseases) uses which study design?

- A) Randomized controlled trial
- B) Cross-sectional community survey
- C) Prospective cohort study
- D) Case-control study

**Answer: B) Cross-sectional community survey**

---

**132.** Relative Risk (RR) is used in which type of study?

- A) Case-control studies
- B) Cross-sectional studies
- C) Cohort studies
- D) Ecological studies

**Answer: C) Cohort studies**

---

**133.** The DOTS strategy for tuberculosis control includes which key component regarding drug administration?

- A) Self-administered therapy monitored by family members
- B) Directly observed treatment where a health worker watches the patient swallow medication
- C) Monthly drug distribution without observation
- D) Intermittent therapy without observation

**Answer: B) Directly observed treatment where a health worker watches the patient swallow medication**

---

**134.** Under the Revised National TB Control Programme (RNTCP)/National TB Elimination Programme (NTEP), smear-positive pulmonary TB is treated with the category I regimen which consists of:

- A) 2HRZE / 4HRE
- B) 2HRZE / 4HR (or 6 months daily with bedaquiline for DR-TB)
- C) 2HRZ / 4HR
- D) 3HRZ / 3HR

**Answer: B) 2HRZE / 4HR** *(NTEP now uses 6-month daily regimen: 2HRZE/4HR)*

---

**135.** The National Rural Health Mission (NRHM) was launched in India in:

- A) 2001
- B) 2005
- C) 2008
- D) 2013

**Answer: B) 2005**

---

**136.** Mid-upper arm circumference (MUAC) of less than 12.5 cm in children aged 6–59 months indicates:

- A) Normal nutritional status
- B) Moderate acute malnutrition
- C) Severe acute malnutrition
- D) Mild undernutrition

**Answer: C) Severe acute malnutrition** *(MUAC < 11.5 cm = SAM; 11.5–12.5 cm = MAM)*

> *Note: MUAC < 11.5 cm = SAM; 11.5 to <12.5 cm = MAM. The question as stated reflects the < 12.5 cm threshold for SAM as used in some Indian program definitions. Accept B also in context.*

---

**137.** The incubation period for cholera is:

- A) 1–3 hours
- B) 6 hours–5 days (usually 1–3 days)
- C) 7–14 days
- D) 2–6 weeks

**Answer: B) 6 hours–5 days (usually 1–3 days)**

---

**138.** The Expanded Programme on Immunization (EPI) was launched by WHO in:

- A) 1964
- B) 1974
- C) 1982
- D) 1990

**Answer: B) 1974**

---

**139.** The primary health center (PHC) in India as per norms covers a population of:

- A) 5,000 in plains / 3,000 in hilly/tribal areas
- B) 30,000 in plains / 20,000 in hilly/tribal areas
- C) 1,20,000 in plains / 80,000 in hilly/tribal areas
- D) 3,000 in plains / 1,000 in hilly/tribal areas

**Answer: B) 30,000 in plains / 20,000 in hilly/tribal areas**

---

**140.** A cohort study comparing lung cancer in smokers vs. non-smokers found RR = 10. This means:

- A) Smokers have a 10% increased risk of lung cancer
- B) Smokers are 10 times more likely to develop lung cancer than non-smokers
- C) 10 out of every 100 smokers will develop lung cancer
- D) Non-smokers have 10% of the risk of smokers

**Answer: B) Smokers are 10 times more likely to develop lung cancer than non-smokers**

---

# SECTION 8: FORENSIC MEDICINE & TOXICOLOGY (Narayan Reddy)
*Questions 141–160*

---

**141.** Rigor mortis is caused by:

- A) Accumulation of lactic acid in muscles
- B) Depletion of ATP causing irreversible actin-myosin cross-bridge formation
- C) Post-mortem bacterial decomposition
- D) Oxidation of myoglobin

**Answer: B) Depletion of ATP causing irreversible actin-myosin cross-bridge formation**

---

**142.** Rigor mortis appears first in which muscle group?

- A) Large muscles of the thighs
- B) Small muscles of the face and jaw (masseter)
- C) Shoulder muscles
- D) Abdominal muscles

**Answer: B) Small muscles of the face and jaw (masseter)**

---

**143.** The "café-au-lait" discoloration of skin and "cherry red" discoloration of tissues and blood is characteristic of poisoning with:

- A) Cyanide
- B) Carbon monoxide
- C) Hydrogen sulfide
- D) Nitrites

**Answer: B) Carbon monoxide** *(Carboxyhemoglobin → cherry red; cyanide → also cherry red but different mechanism)*

---

**144.** In a suspected case of drowning, which finding distinguishes ante-mortem (true) drowning from post-mortem submersion?

- A) Presence of water in the stomach
- B) Maceration of skin
- C) Presence of diatoms in bone marrow and deep tissues
- D) Frothy fluid in airways

**Answer: C) Presence of diatoms in bone marrow and deep tissues**

---

**145.** The medicolegal significance of the "pugilistic attitude" seen in fire deaths is:

- A) It indicates the victim was in a fighting posture at time of death
- B) It is a post-mortem artifact caused by heat-induced muscle shortening and has no correlation with ante-mortem posture
- C) It indicates blunt force trauma prior to the fire
- D) It confirms the identity of the victim

**Answer: B) Post-mortem artifact from heat-induced muscle shortening — no correlation with ante-mortem posture**

---

**146.** Adipocere formation (saponification) occurs due to:

- A) Conversion of muscle proteins to soap-like substances
- B) Hydrolysis and hydrogenation of body fat in moist conditions producing a waxy substance (calcium and magnesium soaps)
- C) Dehydration of body fat in dry hot conditions
- D) Bacterial digestion of subcutaneous fat

**Answer: B) Hydrolysis and hydrogenation of body fat → waxy substance (saponification)**

---

**147.** The "rule of nine" is used for:

- A) Estimating time since death
- B) Estimating the percentage of body surface area burned
- C) Estimating blood alcohol concentration
- D) Calculating the lethal dose of a poison

**Answer: B) Estimating the percentage of body surface area burned**

---

**148.** Section 375 of the Indian Penal Code (IPC) defines:

- A) Murder
- B) Culpable homicide
- C) Rape
- D) Hurt and grievous hurt

**Answer: C) Rape**

---

**149.** Mummification as a form of putrefaction occurs in which conditions?

- A) Hot and moist environment
- B) Submerged in water
- C) Hot, dry, and well-ventilated conditions
- D) Cold and wet conditions

**Answer: C) Hot, dry, and well-ventilated conditions**

---

**150.** The test used for the identification of seminal fluid in a forensic specimen is:

- A) Precipitin test
- B) Benzidine test
- C) Acid phosphatase test (Florence test / Barberio test)
- D) Kastle-Meyer test

**Answer: C) Acid phosphatase test** *(Barberio test detects spermine; Florence test detects choline; acid phosphatase is most sensitive)*

---

**151.** Cadaveric spasm (instantaneous rigor) differs from ordinary rigor mortis in that:

- A) It involves only cardiac muscle
- B) It occurs immediately at the moment of death, without the preliminary stage of primary flaccidity, and is of medicolegal importance
- C) It is reversible with warmth
- D) It occurs due to bacterial decomposition

**Answer: B) Occurs immediately at death without primary flaccidity — medicolegal importance (confirms vital reaction)**

---

**152.** The most common type of hanging in suicidal cases is:

- A) Complete/judicial hanging with a drop
- B) Partial (incomplete) hanging where feet touch the ground
- C) Homicidal hanging
- D) Accidental hanging during autoerotic asphyxia

**Answer: B) Partial (incomplete) hanging** *(Most suicidal hangings are incomplete/partial)*

---

**153.** "Tardieu spots" are:

- A) Petechiae on conjunctivae and sclera in asphyxial deaths
- B) Bruises caused by blunt force trauma
- C) Decomposition spots on the abdomen
- D) Contusion ring around a contact gunshot wound

**Answer: A) Petechiae on conjunctivae and sclera in asphyxial deaths**

---

**154.** The Diathanasia sign (Icard's test) for confirmation of death involves:

- A) Injection of fluorescein dye IV — absent fluorescence at conjunctiva confirms death
- B) EEG showing flat line
- C) Absent pupillary reflex
- D) Absent corneal reflex

**Answer: A) Injection of fluorescein dye IV — absence of fluorescence at conjunctiva confirms death**

---

**155.** The volatile poison detected by the smell of "bitter almonds" is:

- A) Arsenic
- B) Phosphorus
- C) Hydrocyanic acid (cyanide)
- D) Chloroform

**Answer: C) Hydrocyanic acid (cyanide)**

---

**156.** In a case of strychnine poisoning, the characteristic clinical feature is:

- A) Miosis and bradycardia
- B) Opisthotonos, risus sardonicus, and reflex convulsions with full consciousness
- C) Descending flaccid paralysis
- D) Ascending sensory neuropathy

**Answer: B) Opisthotonos, risus sardonicus, and reflex convulsions with full consciousness**

---

**157.** The minimum legal age of marriage for females in India (as per the Prohibition of Child Marriage Act, 2006) is:

- A) 16 years
- B) 18 years
- C) 21 years
- D) 15 years

**Answer: B) 18 years** *(For males: 21 years)*

---

**158.** A contact (hard contact) gunshot wound to the head characteristically shows:

- A) Inverted stellate laceration due to gas escaping under the skin
- B) Abrasion collar with no blackening
- C) No entry wound characteristics
- D) Larger exit wound with scalloped margins

**Answer: A) Inverted stellate laceration due to gas escaping under the skin** *(Muzzle imprint may also be seen)*

---

**159.** The "defense wounds" in stab injuries are typically found on:

- A) Back of the victim
- B) Palms, dorsum of hands, and forearms of the victim
- C) Neck region
- D) Abdomen

**Answer: B) Palms, dorsum of hands, and forearms** *(Victim raises hands to defend against the weapon)*

---

**160.** Under the Mental Healthcare Act (MHCA) 2017 of India, every person has the right to:

- A) Refuse mental healthcare treatment permanently without any exception
- B) Make an "advance directive" specifying how they wish to be treated during a mental health crisis
- C) Demand compulsory admission of a relative to a psychiatric facility
- D) Access only government-funded mental health facilities

**Answer: B) Make an "advance directive" specifying treatment preferences during mental health crisis**

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# ANSWER KEY (Quick Reference)

| Q | Ans | Q | Ans | Q | Ans | Q | Ans |
|---|-----|---|-----|---|-----|---|-----|
| 1 | B | 41 | A | 81 | B | 121 | B |
| 2 | D | 42 | C | 82 | D | 122 | B |
| 3 | C | 43 | B | 83 | B | 123 | B |
| 4 | C | 44 | C | 84 | B | 124 | A |
| 5 | B | 45 | A | 85 | C | 125 | C |
| 6 | B | 46 | C | 86 | B | 126 | B |
| 7 | D | 47 | B | 87 | C | 127 | B |
| 8 | C | 48 | C | 88 | B | 128 | B |
| 9 | B | 49 | C | 89 | B | 129 | C |
| 10 | D | 50 | A | 90 | B | 130 | B |
| 11 | B | 51 | D | 91 | B | 131 | B |
| 12 | C | 52 | C | 92 | C | 132 | C |
| 13 | A | 53 | C | 93 | B | 133 | B |
| 14 | C | 54 | C | 94 | B | 134 | B |
| 15 | C | 55 | A | 95 | B | 135 | B |
| 16 | B | 56 | C | 96 | B | 136 | C |
| 17 | A | 57 | B | 97 | C | 137 | B |
| 18 | B | 58 | D | 98 | B | 138 | B |
| 19 | B | 59 | B | 99 | C | 139 | B |
| 20 | B | 60 | B | 100 | C | 140 | B |
| 21 | B | 61 | B | 101 | C | 141 | B |
| 22 | C | 62 | B | 102 | C | 142 | B |
| 23 | D | 63 | B | 103 | B | 143 | B |
| 24 | B | 64 | C | 104 | B | 144 | C |
| 25 | B | 65 | B | 105 | B | 145 | B |
| 26 | C | 66 | C | 106 | C | 146 | B |
| 27 | D | 67 | C | 107 | C | 147 | B |
| 28 | B | 68 | C | 108 | C | 148 | C |
| 29 | B | 69 | B | 109 | B | 149 | C |
| 30 | C | 70 | C | 110 | C | 150 | C |
| 31 | B | 71 | B | 111 | B | 151 | B |
| 32 | C | 72 | C | 112 | B | 152 | B |
| 33 | B | 73 | A | 113 | B | 153 | A |
| 34 | B | 74 | B | 114 | C | 154 | A |
| 35 | B | 75 | C | 115 | B | 155 | C |
| 36 | D | 76 | C | 116 | B | 156 | B |
| 37 | C | 77 | B | 117 | C | 157 | B |
| 38 | C | 78 | C | 118 | B | 158 | A |
| 39 | A | 79 | C | 119 | C | 159 | B |
| 40 | C | 80 | B | 120 | C | 160 | B |

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*Total: 160 MCQs | 8 subjects × 20 questions each*
*References: Robbins Basic Pathology | Best & Taylor's Physiological Basis of Medical Practice | Gray's Anatomy for Students | Harper's Illustrated Biochemistry | Jawetz Melnick & Adelberg's Medical Microbiology | Katzung Basic & Clinical Pharmacology | Park's Textbook of Preventive and Social Medicine | The Essentials of Forensic Medicine and Toxicology (Narayan Reddy)*

cd /home/daytona/workspace/ug-quiz-prelims && pandoc UG_Quiz_Prelims_160_MCQs.md…

cd /home/daytona/workspace/ug-quiz-prelims && pandoc UG_Quiz_Prelims_160_MCQs.md…