This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infertility, Subject name: Gynaecology & Obstetrics
Non steroidal/ anti hormonal substance used to induce ovulation: 
Select and explain. 
A. Mifepristone, B. Clomiphene citrate, C. Tamoxifen, D. Raloxifen
B: Clomiphene citrate
Answer: B: Clomiphene citrate 
Explanation: Clomiphene citrate is used for ovulation induction. Dose- 50mg/day staingfrom day 2 to day 6 of the cycle for 5 days. Clomiphene citrate is nonsteroidal triphenylethylene derivative that demonstrates both estrogen agonist and antagonist propeies. Williams textbook of gynaecology 3rd edition page 451