This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Pathology
True about Insulinoma is: 
Select and explain. 
A. Alpha cell tumor, B. Most of them are malignant, C. C-peptide level is elevated, D. It is not associated with MEN 1 syndrome
C: C-peptide level is elevated
Answer: C: C-peptide level is elevated 
Explanation: Insulinoma b-cell tumor Benign C peptide level is elevated Most common of pancreatic Neuro-endocrine neoplasms Produce sufficient insulin to induce clinically significant hypoglycaemia MEN 1 syndrome- Associated with 3-Ps Pancreas:- Gastrinoma, Insulinoma Pituitary tumor Parathyroid