This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
A a1 selective adrenergic blocking agents used in benign prostatic hypertrophy is 
Select and explain. 
A. Prazosin, B. Terazosin, C. Doxazosin, D. Tamsulosin
D: Tamsulosin
Answer: D: Tamsulosin 
Explanation: D. i.e. (Tamsulosin) (135- KDT 6th) (83- Lippincott's 3rd)* Prazosi, Terazosin, Doxazosin are useful in the treatment of hypertension. Tamsulosin is indicated for the treatment of benign prostatic hypertrophy (83- Lippincott's 3rd)* According to KDT all are used in BPH. but Tamsulosin is best answer of choice* TAMSULOSIN - is Uroselective aIA/ a1D blocker** better tolerated less side effects* Selective b1 antagonist is - Atenolol*** Selective b2 antagonist is - Butoxamine**