This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Use of phenoxybenzamine is \nSelect and explain. \nA. Hypeension, B. Pheochromocytoma, C. Angiography, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Phenoxybenzamine is a non-selective alpha blocker used in HTN, Pheo and for aeriography sometimes. Ref: KD Tripathi 8th ed.', 'role': 'assistant'}]