This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Most common symptoms of pheochromocytoma except - \nSelect and explain. \nA. Headache, B. Palpitation, C. Abdominal pain, D. Hypotension', 'role': 'user'}, {'content': 'Answer: D \nExplanation: episodes of palpitation , headaches and abdominal pain , hypeension (Harrison 17 pg 2270)', 'role': 'assistant'}]