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': 'Oropharynx lies against which vertebra \nSelect and explain. \nA. C1, B. C2, C. C3, D. C4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Oropharynx lies opposite to C2 and upper part of C3 vertebrae.\nPharynx\xa0ends at C6 vertebrae.', 'role': 'assistant'}]