<prompt> Most common and most malignant neuroendocrine tumour of pancreas?GastrinomaGlucagonomaInsulinomaVIPoma  <response>: Ans. a GastrinomaRef: Sabiston 20th edition Page 954 MC functioning endocrine neoplasm of pancreas - insulinoma MC endocrine neoplasm in MEN - 1 Syndrome - Gastrinoma MC and most malignant endocrine neoplasm - gastrinoma MC neuroendocrine tumor - Nonfunctioning tumors 