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': 'Pyriform fossa is situated in ? \nSelect and explain. \nA. Oropharynx, B. Hypopharynx, C. Nasopharynx, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Hypopharynx Pyriform fossa is a pa of laryngopharynx (hypopharynx)", 'role': 'assistant'}]