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: Unknown
Medullary thyroid carcinoma is associated with- 
Select and explain. 
A. MEN I, B. MEN II, C. MEN IV, D. All of the above
B: MEN II
Answer: B: MEN II 
Explanation: Ans. is 'b' i.e., MEN II o About 70% of tumors arise sporadically. The remainder occurs in the rsetting of MEN syndrome 2A or 2B or as familial tumors without an associated MEN syndrome (familial medullary thyroid carcinoma, or FMTC