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: Radiology
[{'content': 'Most suitable radioisotope of Iodine for treating hyperthyroidism is – \nSelect and explain. \nA. I123, B. I125, C. I131, D. I132', 'role': 'user'}, {'content': 'Answer: C \nExplanation: I131 is the radioisotope of choice for radiotherapy of thyroid carcinoma and hyperparathyroidism', 'role': 'assistant'}]