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': 'Common cause of congenital stridor in child? \nSelect and explain. \nA. Laryngomalacia, B. Laryngeal web, C. Hemangioma, D. Subglottic stenosis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Laryngomalacia", 'role': 'assistant'}]