This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Adrenal Gland, Subject name: Medicine
[{'content': 'Most common functional neuroendocrine tumor of pancreas? \nSelect and explain. \nA. Gastrinoma, B. Somatostatinoma, C. Insulinoma, D. VIPoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The incidence of Insulinoma is 1-2% whereas the =dente of ZES is given as 0.5-1.5%. Name Biologically active peptide(s) secreted Incidence (new cases /106 population/year) Tumor location Well- established functional pNET syndromes Zollinger- Ellison Syndrome Gastrin 0.5-1.5 Duodenum (70%)* Pancreas (25%) Insulinoma Insulin 1-2 Pancreas (>99%) VIPoma (Verner-Morrison syndrome, pancreatic cholera, WDHA) Vasoactive intestinal peptide 0.05-0.2 Pancreas (99%, adult) other (10%,neural, adrenal, periganglionic) Glucagonoma Glucagon 0.01-0.1 Pancreas (100%) Somatostatinoma Somatostatin Rare Pancreas (55%) Duodenum/jejunum (44%)', 'role': 'assistant'}]