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
Use of phenoxybenzamine is 
Select and explain. 
A. Hypeension, B. Pheochromocytoma, C. Angiography, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Phenoxybenzamine is a non-selective alpha blocker used in HTN, Pheo and for aeriography sometimes. Ref: KD Tripathi 8th ed.