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': 'Stage 2B nasopharyngeal angiofibroma best treated with - \nSelect and explain. \nA. Surgery, B. Chemotherapy, C. Radiotherapy, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: "In nearly every other circumstance, however, surgery is the treatment of choice".', 'role': 'assistant'}]