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
Commonest thyroid tumor in MEN (multiple endocrine neoplasia) - 
Select and explain. 
A. Follicular, B. Papillary, C. Anaplastic, D. Medullary
D: Medullary
Answer: D: Medullary 
Explanation: Ans. is 'd' i.e., Medullary o Thyroid tumor is seen in MEN II, and is medullary carcinoma of thyroid.