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': 'Graveyard of ENT surgeon \nSelect and explain. \nA. Pyriform Fossa, B. Bucco Labial sulcus, C. Tonsilolingual sulcus, D. Peritonsillar space', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tonsilolingual sulcus is seat of carcinoma usually missed by ENT doctor in OPD to check.', 'role': 'assistant'}]