This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteoporosis, Sex Hormones and OCPs, Subject name: Pharmacology
Inhibition of spermatogenesis occurs by which of the following given drug ? 
Select and explain. 
A. Gelusil, B. Gossypol, C. Gestodine, D. Gemcadiol
B: Gossypol
Answer: B: Gossypol 
Explanation: Gossypol Nonsteroidal compound MOA :Toxicity on seminiferous epithelium. Reduces sperm motility Libido and potency are not affected S/E : Hypokalemia ,edema, diarrhoea,breathlessness and neuritis