This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pediatrics
[{'content': 'Most common cause of stridor sholy after bih \nSelect and explain. \nA. Laryngeal papilloma, B. Laryngeal web, C. Laryngomalacia, D. Vocal cord palsy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Laryngomalacia is the most common congenital anomaly of larynx.Inspiratory stridor is the hallmark of this condition.Symptoms aggrevated when child is in supine position or crying.Condition is generally benign and self limited and most cases resolve by 18 months of age. Ref : Essential Pediatrics,O.P.Ghai,7th edition,Pg No:340', 'role': 'assistant'}]