1. Probable diagnosis

2. Associated congenital anomalies, any four

1. Vertebral anomalies
2. Anorectal malformations
3. Cardiac defects: VSD, ASD, TOF, PDA
4. Renal anomalies: renal agenesis, ectopic kidney, hydronephrosis
5. Limb anomalies: radial ray defect, thumb hypoplasia
6. Other associations: duodenal atresia, tracheomalacia, CHARGE syndrome.

3. Precautions during intubation, any four

1. Avoid bag-mask ventilation, if possible, because air can pass through the distal fistula into the stomach causing severe gastric distension and respiratory compromise.
2. Perform gentle intubation and maintain spontaneous ventilation until the airway is secured, especially if a difficult airway is anticipated.
3. Place the ETT tip beyond the fistula but above the carina, usually by advancing it into the right main bronchus initially and then withdrawing until bilateral air entry is heard.
4. Use minimal positive-pressure ventilation and low airway pressures.
5. Prefer preoperative rigid bronchoscopy to identify the fistula site and assess for airway anomalies.
6. Keep the infant head-up, suction the upper esophageal pouch continuously, and arrange gastric decompression when appropriate.
7. Avoid excessive manipulation and accidental esophageal intubation.

4. Any two methods to confirm correct ETT placement

1. Continuous capnography: persistent exhaled CO₂ waveform.
2. Clinical examination: equal bilateral chest rise and bilateral air entry, with no increasing abdominal distension.