This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
Androgen receptor blocking drug is : 
Select and explain. 
A. Tamoxifen, B. Cyproterone acetate, C. Mifepristone, D. Nalondrone
B: Cyproterone acetate
Answer: B: Cyproterone acetate 
Explanation: Ans. is 'b' Cyproterone acetate Cyproterone acetate is a Potent Antiandrogen competes with dihydrotestosterone for the intracellular androgen receptor and inhibits its binding.