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: Medicine
All are associated with MEN 2 except: 
Select and explain. 
A. Pheochromocytoma, B. Islet cell hyperplasia, C. Medullary carcinoma thyroid, D. Parathyroid adenoma
B: Islet cell hyperplasia
Answer: B: Islet cell hyperplasia 
Explanation: Answer is B (Islet cell hyperplasia): Pituitary islet cell tumors/hyperplasia are associated with MEN- I syndromes and not with MEN II syndromes.