This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'All of the following are features of pheochromocytoma except - \nSelect and explain. \nA. Hypertensive paraoxysm, B. Headache, C. Orthostatic hypotension, D. Wheezing', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most adrenal medullary tumours secrete norepinephrine or epinephrine or both and produce sustained hypertension. \nSometimes catecholamines are released in spurts which produce paroxysmal hypertension.\n\nHypertension when episodic is accompanied by other manifestations of catecholamine excess such as : \n-Palpitations\n-Tachycardia\n-Feeling of anxiety\n-Excessive sweating\nHeadache, palpitation and diaphoresis constitute the classic triad of pheochromocytoma.\nParoxysmal hypertension return to normal when catecholamine level becomes normal.\nOrthostatic hypotension occurs because of diminished plasma volume and blunted baroreceptor reflex.', 'role': 'assistant'}]