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': 'Treatment of choice for T2 carcinoma of nasopharynx is - \nSelect and explain. \nA. Surgery, B. Radiotherapy, C. Chemotherapy, D. Surgery + postoperative radiotherapy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Irradiation is treatment of choice (external radiotherapy).', 'role': 'assistant'}]