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': "Paget's disease of the nipple is treated by - \nSelect and explain. \nA. Radiotherapy, B. Radical mastectomy, C. Biopsy and simple mastectomy, D. Chemotherapy", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]