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Now I have enough information to answer all 20 questions accurately. Here are the complete answers:

Forensic Medicine (RS3) - MCQ Answers


1. The ideal place to record body temperature in dead body is: Answer: a) Rectum Rectal temperature is the standard site for estimating time of death (postmortem interval). It is protected from environmental fluctuations and gives the most reliable reading.

2. In case of drowning in sea water: Answer: b) Hb decreases In sea water (hypertonic) drowning, water is drawn from the blood into the lungs by osmosis, causing hemoconcentration is NOT the main issue here - actually seawater draws fluid INTO alveoli, causing hypovolemia and hemoconcentration. However, the classic teaching is that in seawater drowning, plasma is drawn into the alveoli (hyperosmotic effect), leading to hemoconcentration - but the traditional MCQ answer taught in Indian forensic medicine is that Hb decreases in freshwater (hemodilution) and there is no change / slight increase in seawater. Re-examining: In freshwater drowning - Hb decreases (dilution); in seawater drowning - Hb increases (concentration). The correct answer for seawater drowning is a) Hb increases - but among the options given, a) Hb increases is correct for seawater drowning. Answer: a) Hb increases

3. Gallbladder in starvation death is: Answer: b) Distended In starvation, there is no food stimulus to contract the gallbladder, so bile accumulates and the gallbladder becomes distended (hydrops/mucocele-like). This is a classic forensic autopsy finding.

4. Paradoxical undressing is seen in: Answer: c) Hypothermia Confirmed by multiple textbooks - paradoxical undressing is a preterminal behavior in hypothermia where victims remove their clothing despite being in a cold environment, due to a paradoxical sensation of heat from peripheral vasodilation (DiMaio's Forensic Pathology; Harrison's Internal Medicine 22e).

5. Smokeless gunpowder is composed of: Answer: d) Nitrocellulose Confirmed by Rosen's Emergency Medicine: "smokeless powder made with a single base (nitrocellulose) or a double base (nitrocellulose and nitroglycerin)." KMnO4 is used in country bombs; HCN is a poison gas; sulphur is in black (not smokeless) powder.

6. Findings in the examination of Genitals in child are, EXCEPT: Answer: d) Vaginal walls are separated apart Normal prepubertal genital findings include: fourchette and posterior commissure intact, labia minora covered by labia majora, and hymen is a narrow opening. Vaginal walls being separated apart is NOT a normal finding - it would indicate sexual abuse. Hence d) is the exception (abnormal finding).

7. Which of the following is a mandatory part of definition of rape? Answer: d) None of the above Under Indian law (now BNS), penile penetration of the vagina to any extent constitutes rape - penetration beyond labia minora or beyond external os is NOT required. Tear of hymen is also not mandatory (hymen may be elastic). The key element is any degree of penetration.

8. Definition of rape under which BNS? Answer: a) 63 BNS - Wait, the options are 61, 62, 63, 64 BNS. Under the Bharatiya Nyaya Sanhita (BNS) 2023 which replaced IPC, rape is defined under Section 63 BNS (previously Section 375 IPC). Answer: c) 63 BNS

9. Contributory negligence is a defence in: Answer: a) Civil negligence Contributory negligence (where the plaintiff's own negligence contributed to the harm) is a recognised defence in civil/tort law. It does not apply to criminal negligence.

10. HOOCH tragedy is related to: Answer: d) Methanol Hooch (spurious liquor) tragedies are caused by methanol (methyl alcohol) contamination of illicit liquor. Methanol is metabolised to formaldehyde and formic acid, causing metabolic acidosis, blindness, and death.

11. Treatment of choice for acute arsenic poisoning is: Answer: b) Dimercaprol (BAL) Confirmed by multiple textbooks including The Essentials of Forensic Medicine and Toxicology (2026 edition): BAL (British anti-lewisite; dimercaprol) is the primary chelating agent for acute arsenic poisoning. Penicillamine is used for chronic arsenic/lead/copper poisoning.

12. Earliest manifestation in lead poisoning is: Answer: a) Abdominal pain The earliest symptom of acute lead poisoning is abdominal colic (lead colic) - severe cramping abdominal pain. Burton's line (blue-black gum line), facial pallor, and other features come later.

13. Gastric lavage can be performed in case of poisoning by: Answer: d) Kerosene oil This is a classic "except" type concept - gastric lavage is CONTRAINDICATED in corrosives (sulphuric acid, carbolic acid) due to risk of perforation, and in strychnine (risk of triggering convulsions). Kerosene is a controversial case - while hydrocarbons carry aspiration risk, among the given options, kerosene is the one where lavage may still be performed (with precautions) compared to the absolute contraindications of corrosives and strychnine. Answer: d) Kerosene oil

14. Which of the following is commonly used for preservation of viscera in poisoning cases? Answer: c) Formalin Wait - formalin is used for HISTOPATHOLOGY preservation but NOT for viscera in poisoning cases, as it interferes with chemical analysis. The correct preservative for viscera in poisoning cases is saturated salt solution (rectified spirit/alcohol is also used). Among the options: glycerin, rectified spirit, formalin, saturated salt solution - saturated salt solution is used when alcohol/volatile poisons are suspected; rectified spirit (alcohol) is used generally. Formalin is NOT used. Answer: d) Saturated salt solution - but rectified spirit (b) is also standard. In Indian forensic medicine, saturated common salt solution is the standard preservative for viscera sent for chemical analysis in poisoning cases (rectified spirit interferes with alcohol estimation). Answer: d) Saturated salt solution

15. The most common drug which causes physical dependence is: Answer: b) Heroine (Heroin) Opioids (heroin) cause the most severe physical dependence of all drugs of abuse. Ketamine and PCP cause psychological dependence primarily. LSD causes psychological dependence with no significant physical dependence.

16. Garden fruit - anticholinergic features (dry hot skin, unable to pass urine/stools, irritability, restlessness) - identify poison and antidote: The features describe anticholinergic toxidrome: dry skin, urinary retention, constipation, irritability, restlessness. Datura (Jimson weed/thorn apple) contains atropine-like alkaloids (hyoscine, hyoscyamine) causing these features. The antidote for anticholinergic poisoning is physostigmine (a cholinesterase inhibitor). Pralidoxime is the antidote for organophosphate poisoning. Answer: b) Datura, physostigmine

17. Cadmium poisoning is classically associated with which disease? Answer: b) Itai-Itai disease Confirmed by multiple textbooks: Cadmium poisoning causes Itai-itai ("ouch-ouch") disease in Japan due to Fanconi syndrome and severe bone demineralization. Minimata = mercury; Blackfoot = arsenic; Mad Hatter = mercury.

18. Seizures with arching of back, conscious between episodes, herbal medicines - likely cause: The description - multiple seizure episodes, conscious in between, arching of the back (opisthotonus) - is the classic picture of strychnine poisoning. Strychnine causes tetanic convulsions with full consciousness between spasms, with opisthotonus (arching of back due to extensor spasm). Answer: a) Strychnine

19. Farmer - sting on leg - drowsy, profuse bleeding from wound, red blisters - most likely cause: Key features: local bleeding, blistering, and systemic effects (drowsiness). This is a cytotoxic/hemotoxic envenomation pattern. Viper bites cause local tissue destruction, coagulopathy/bleeding, blistering, and pain. Cobra bites cause neurotoxic features; scorpion stings cause autonomic features; wasp stings cause allergic/anaphylactic reactions. Answer: a) Viper

20. 5-year-old child - iron syrup overdose 60 mg/kg - which is CONTRAINDICATED? Answer: a) Calcium EDETATE In iron poisoning, the specific antidote is deferoxamine (option b). BAL (dimercaprol) is contraindicated in iron poisoning as it forms a toxic complex. Calcium EDETATE is used for lead poisoning and is not appropriate here. However, the question asks what is contraindicated - BAL (c) is classically contraindicated in iron poisoning as the BAL-iron complex is nephrotoxic. But Calcium EDETATE (a) is also not indicated. In standard Indian pharmacology teaching, BAL is contraindicated in iron (and cadmium) poisoning. Answer: c) BAL

Summary Answer Key

QAnswerKey Fact
1a) RectumBest site for PMI estimation
2a) Hb increasesSeawater = plasma drawn to lungs = hemoconcentration
3b) DistendedNo bile stimulus in starvation
4c) HypothermiaParadoxical undressing = preterminal hypothermia sign
5d) NitrocelluloseSingle/double base smokeless powder
6d) Vaginal walls separated apartAbnormal finding = sign of abuse
7d) None of the aboveAny degree of penetration = rape
8c) 63 BNSReplaced IPC 375
9a) Civil negligenceContributory negligence = tort defence
10d) MethanolHooch = illicit liquor + methanol
11b) DimercaprolBAL = TOC for acute arsenic poisoning
12a) Abdominal painLead colic = earliest symptom
13d) Kerosene oilLavage contraindicated in corrosives & strychnine
14d) Saturated salt solutionStandard preservative for viscera in poisoning
15b) HeroinStrongest physical dependence
16b) Datura, physostigmineAnticholinergic syndrome; physostigmine reverses it
17b) Itai-Itai diseaseCadmium = ouch-ouch disease, Japan
18a) StrychnineOpisthotonus + conscious between spasms
19a) ViperHemotoxic + local necrosis + blistering
20c) BALBAL contraindicated in iron poisoning (toxic complex)
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