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': 'Which one of the following is not included in the treatment of malignant melanoma- \nSelect and explain. \nA. Radiation, B. Surgical excision, C. Chemotherapy, D. Immunotherapy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]