This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pathology
Wermer syndrome is 
Select and explain. 
A. MEN1, B. MEN IIA, C. MEN IIB, D. AIP
A: MEN1
Answer: A: MEN1 
Explanation: Wermer syndrome is otherwise known as Multiple Endocrine neoplasia type 1 (MEN 1). It is characterised by primary hyperparathyroidism,endocrine tumours of pancreas, and abnormalities of pituitary (primarily prolactinoma). It is due to germline mutation of MEN1 tumour suppressor gene,which encodes a protein called menin. (Ref :ROBBINS text book of pathology)