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 seen in ? \nSelect and explain. \nA. Acute epiglottis, B. Laryngotracheobronchitis (croup), C. In both cases, D. None of above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Laryngotracheobronchitis (croup)", 'role': 'assistant'}]