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': 'Commonest thyroid tumor in MEN (multiple endocrine neoplasia) ? \nSelect and explain. \nA. Follicular, B. Papillary, C. Anaplastic, D. Medullary', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Medullary Thyroid tumor is seen in MEN II, and is medullary carcinoma of thyroid.", 'role': 'assistant'}]