<prompt> A drug X primarily reduces the static component of urinary obstruction in benign hyperophy of prostate and takes more than 3 months to exe its beneficial effect. Which of the following is X?TamsulosinTerazosinFinasterideAmphetamine  <response>: 5-a-reductase inhibitors: Finasteride reduce the static component of urinary obstruction in BHP-- Delayed action 3months Selective a1 blockers are used to relieve the dynamic obstruction in BHP--provides rapid symptomatic relief. 