This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
[{'content': "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' ? \nSelect and explain. \nA. Tamsulosin, B. Terazosin, C. Finasteride, D. Amphetamine", 'role': 'user'}, {'content': 'Answer: C \nExplanation: (Ref: KDT 6/e p294, 295) S-a-reductase inibitors are used to reduce the static component of urinary obstruction in BHP. It is delayed acting and takes more than 3 months to exe its beneficial effect. Selective a1 blockers are used to relieve the dynamic obstruction in BHP. These provide rapid symptomatic relief.', 'role': 'assistant'}]