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
All the drugs have anti-androgenic effects except 
Select and explain. 
A. Progesterone, B. Dutasteride, C. Flutamide, D. Spironolactone
A: Progesterone
Answer: A: Progesterone 
Explanation: Progesterone had mild androgenic effects except for 3rd gen progesterones which are devoid of androgenic effects Flutamide,nilutamide and bicalutamide are androgen antagonists. Finasteride and dutasteride 5 alpha reductase inhibiters Spironolatone is androgen receptor antagonist Ref: HL Sharma 3rd ed Pg 595