This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Parathyroid Gland, Subject name: Medicine
[{'content': 'Which is the most common entero-pancreatic tumour in MEN 1? \nSelect and explain. \nA. Insulinoma, B. VIPoma, C. Non-functioning pituitary adenoma, D. Gastrinoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most common entero-pancreatic tumour in MEN 1 is gastrinoma which leads to recurrent peptic ulcers. The diagnosis is established by demonstration of elevated serum gastrin levels and basal gastric acid secretion. Choice C is non functioning pituitary adenoma and not non functioning entero-pancreatic tumor Multiple Endocrine Neoplasia (MEN) TYPE (CHROMOSOMAL LOCATION) TUMORS (ESTIMATED PENETRACE) MEN 1 (11q13) Parathyroid adenoma (90%) Enteropancreatic tumor (30-70%) Gastrinoma (> 50%) Insulinoma (10-30%) Nonfunctioning and PPoma (20-55%) Glucagonoma (<3%) VIPoma (<1%) Pituitary adenoma (15-50%) Prolactinoma (60%) Somatotrophinoma (25%) Coicotropinoma (< 5%) Nonfunctioning (< 5%)', 'role': 'assistant'}]