This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'Steeple sign is characteristis of ? \nSelect and explain. \nA. Acute epiglotitis, B. Laryngotrancheobronchitis, C. In both, D. None of above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Laryngotrancheobronchitis", 'role': 'assistant'}]