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: Pharmacology
Alpha 1 blocker used for BHP is: 
Select and explain. 
A. Tamsolusin, B. Prazosin, C. Oxazosin, D. Dolazoline
A: Tamsolusin
Answer: A: Tamsolusin 
Explanation: Tamsolusin