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': 'All except one are used in treatment of marjolins ulcer \nSelect and explain. \nA. Wide excision, B. Radiotherapy, C. Amputation, D. Resection', 'role': 'user'}, {'content': "Answer: B \nExplanation: Radiotherapy is not given for marjolin's ulcer.", 'role': 'assistant'}]