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
[{'content': 'All are anti-androgens except \nSelect and explain. \nA. Finasteride, B. Flutamide, C. Cyproterone acetate, D. Dihydrotestosteron', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Testosterone which is a natural androgen is conveed to more active dihydrotestosterone by the enzyme steroid 5alpha-reductase. All others are anti-androgens. Flutamide, nilutamide, bicalutamide are androgen receptor antagonists (Ref.Essential s of medical pharmacology TD Tripathi 7th edition page no.296)', 'role': 'assistant'}]