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: Pathology
[{'content': 'MEN syndrome is associated with increase in - \nSelect and explain. \nA. Papillary ca of thyroid, B. Medullary, C. Follicular, D. Anaplastic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Medullary thyroid carcinoma is associated with MEN syndrome\xa0→\xa0MEN 2A and MEN 2B.', 'role': 'assistant'}]