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: Medicine
[{'content': 'A 52-year-old male with toxic adenoma, treatment of choice is - \nSelect and explain. \nA. Surgical-removal of adenoma, B. Radiotherapy, C. Radioactive I2, D. Medical treatment', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]