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
[{'content': 'While treating benign prostatic hyperplasia with finasteride the period of trial required for maximum response \nSelect and explain. \nA. 1 month, B. 3 months, C. 6 months, D. 18 months', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Minimum time to act - 1 month\nMaximum response around 6 months.', 'role': 'assistant'}]