This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
All are true about centchroman except 
Select and explain. 
A. It is a non-steroidal contraceptive, B. It is developed in India, C. Useful for women with PCOD, D. Failure rate is 183-284 per HWY
C: Useful for women with PCOD
Answer: C: Useful for women with PCOD 
Explanation: The benzopyran centchroman is also a SERM. Originally developed in India as a non-steroidal oral contraceptive, it was initially proposed as a once-a-weekpill but this was associated with unacceptable failure rates. The dose was therefore revised to twice-weekly for the first three months, followed by weekly doses. It has also been tried for postcoital contraception. It inhibitsosteoclast activity.Ref: Jeffcoate&;s principles of gynaecology; 7th ed; Pg 644