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': 'Which among the following is not true regarding nasopharyngeal carcinoma - \nSelect and explain. \nA. Associated with EBV infection, B. Starts in the fossa of Rosenmuller, C. Radiotherapy is the treatment of choice, D. Adenocarcinoma is usual', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Squamous cell carcinoma in various grades of its differentiation or its variants as transitional cell carcinoma and lymphoepithelioma, is the most common (85%).', 'role': 'assistant'}]