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: Surgery
[{'content': 'The treatment of choice for Nasopharyngeal carcinoma is: \nSelect and explain. \nA. Chemotherapy alone, B. Radiotherapy alone, C. Radiotherapy & surgery, D. Surgery alone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]