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 nasopharyngeal carcinoma T1 - \nSelect and explain. \nA. Radiation therapy, B. Surgery, C. Local resection, D. Chemotherapy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Overall treatment of choice for nasopharyngeal carcinoma → radiotherapy.\nTreatment of choice for early (stage I & II) nasopharyngeal carcinoma → radiotherapy.\nTreatment of choice for advanced (stage III & IV) nasopharyngeal carcinoma → radiotherapy combined with chemotherapy.', 'role': 'assistant'}]