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: ENT
[{'content': 'Congenital larygeal stridor also know as \nSelect and explain. \nA. Laryngeal web, B. Laryngomalocia, C. Laryngeal atenosis, D. Vocal  cord palsy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]