This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'Most common neuroendocrine tumour of pancreas is \nSelect and explain. \nA. Insulinoma, B. Gastrinoma, C. Non-functional tumours, D. VIPoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: TumourIncidence%Insulinoma70-80Gastrinoma20-25Non-functional tumours30-50VIPoma4Glucagonoma4Somatostatinoma<5Carcinoid<1ACTHoma<1GRFoma<1Ref: Bailey and Love 27e pg: 846', 'role': 'assistant'}]