This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
[{'content': 'What is the narrowest pa of the respiratory tract in children? \nSelect and explain. \nA. Glottis, B. Subglottic area, C. Trachea, D. Carina', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The narrowest pa of the adult airway is the vocal cords In children, the narrowest pa is the cricoid cailage located in the subglottic area of the larynx. Ref: Internet', 'role': 'assistant'}]