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': 'Radio iodine is used in treatment of \nSelect and explain. \nA. Papillary CA thyroid, B. Medullary CA thyroid, C. Follicular CA thyroid, D. Anaplastic CA thyroid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Follicular Cell CA', 'role': 'assistant'}]