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
Which among the following is not an androgen receptor blocker ? 
Select and explain. 
A. Finasteride, B. Cyproterone, C. Flutamide, D. None
A: Finasteride
Answer: A: Finasteride 
Explanation: None