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': 'Narrowest pa of infantile larynx is: \nSelect and explain. \nA. Supraglottic, B. Subglottic, C. Glottic, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The diameter of cricoid cailage is smaller than the size of glottis, making subglottis the narrowest pa', 'role': 'assistant'}]