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: Surgery
While treating benign prostatic hyperplasia with finasteride the period of trial required for maximum response 
Select and explain. 
A. 1 month, B. 3 months, C. 6 months, D. 18 months
C: 6 months
Answer: C: 6 months 
Explanation: Minimum time to act - 1 month
Maximum response around 6 months.