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: Anatomy
[{'content': 'Location of pyriformis fossa: \nSelect and explain. \nA. Nasopharynx, B. Oropharynx, C. Laryngeal part of pharynx, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Piriform fossa is a deep recess broad above and narrow below in the anterior part of lateral wall of the laryngopharynx, on each side\xa0of the laryngeal inlet.', 'role': 'assistant'}]