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: Radiology
[{'content': 'Radiotherapy is the "Treatment" of Choice for: \nSelect and explain. \nA. Nasopharyngeal carcinoma T3N I, B. Supraglottic CA T3NO, C. Glottic CA T3NI, D. Subglottic CA T3NO', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nasopharyngeal carcinoma T3N I', 'role': 'assistant'}]