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: Pathology
Malignant potentilal is least with which of the following gastrointestinal neuroendocrine tumor: 
Select and explain. 
A. Insulinoma, B. Glucagonoma, C. VIPoma, D. Somatostatinoma
A: Insulinoma
Answer: A: Insulinoma 
Explanation: Malignant potentilal of the gastrointestinal neuroendocrine tumors.Insulinoma Glucagonoma 50-80 %Somatostatinoma >70 %VIPoma 40-70 %Ref: Harrisons principles of internal medicine, 18th edition, Page: 3056.