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 thyroid malignancy is common after radiation exposure \nSelect and explain. \nA. Follicular, B. Papillary, C. Medullary, D. Anaplastic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]