This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Medicine
[{'content': 'Pheochromocytoma produces all except? \nSelect and explain. \nA. Nor-epinephrine, B. Secretin, C. Vaso-active intestinal polypeptide, D. Calcitonin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pheochromocytoma secrets Norepinephrine VIP- Secretory diarrhea in pheochromocytoma is due to VIP, VIP opens water channels which result in development of secretory Diarrhea Calcitonin- Pheochromocytoma associated with MEN 2a syndrome MEN 2a - Medullary carcinoma of the thyroid(calcitonin), pheochromocytoma, parathyroid hyperplasia', 'role': 'assistant'}]