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': 'Amount of I-131 given for carcinoma of thyroid is \nSelect and explain. \nA. 30-100  mCi in low risk patients, B. 100-200 mCi in high risk patients, C. Both 1 and 2, D. 50 mCi', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]