A 1-year-old child (10 kg) presents with urticaria and wheeze after eating peanut butter. What is the correct management?

Correct Answer: A

Rationale: For anaphylaxis, intramuscular (IM) adrenaline at 0.01 mg/kg (1:1000) is the recommended treatment, equating to 0.1 mL for a 10 kg child.

Correct Answer: C

Rationale: Renal tubular acidosis is associated with normal anion gap metabolic acidosis, unlike conditions like diabetic ketoacidosis and renal failure.

Correct Answer: A

Rationale: Renal tubular acidosis causes normal anion gap metabolic acidosis with hyperchloremia due to impaired bicarbonate reabsorption or acid secretion.

Correct Answer: A

Rationale: Obstructive shock results from physical blockage of blood flow, such as cardiac tamponade or pulmonary embolism, impairing ventricular output.

Correct Answer: C

Rationale: Biliary atresia is a progressive obstruction of the bile ducts, leading to jaundice, dark urine, and pale stools. It requires early diagnosis and surgical intervention (Kasai procedure) to prevent liver failure.