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
Drug of choice associated with pheochromocytoma 
Select and explain. 
A. Phenoxybenzamine, B. Phentolamine, C. Labetalol, D. Esmolol
A: Phenoxybenzamine
Answer: A: Phenoxybenzamine 
Explanation: Drugs used in management of pheochromocytoma DOC is Phenoxybenzamine Ref- pubmed.com <a href=" <p>Ref