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: Surgery
Which of the following is most common and malignant neuroendocrine tumour of pancreas? 
Select and explain. 
A. Gastrinoma, B. Glucagonoma, C. Insulinoma, D. VIPoma
C: Insulinoma
Answer: C: Insulinoma 
Explanation: Answer- C. InsulinomaInsulinomas are the most common pancreatic neuroendocrine tumor, but only l0% are malignant.Gastrin-producing tumor (gastrinoma) are the most common malignant pancreatic neuroendocrine tumor.