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
[{'content': "A drug 'X' primarily reduces the static component of urinary obstruction in benign hypertrophy of prostate and takes more than 3 months to exert 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: None', 'role': 'assistant'}]