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: Gynaecology & Obstetrics
Hypokalemic paralysis is a side effect of: 
Select and explain. 
A. Gossypol, B. DMPA, C. Testosterone enanthate, D. Cyproterone acetate
A: Gossypol
Answer: A: Gossypol 
Explanation: Gossypol

It is a male contraceptive pill which contains-Disequilterpene aldeayde
Discovered in china from an extract of cottonseed.
Mechanism of action it inhibits spermatogenesis and decreases epididymal sperm motility.
Side effect - Hypokalemic paralysis in 1% patients

Other male hormonal contraceptives:
Testosterone enanthate injectable
Testosterone bucolate injectable