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
All are true about centchroman except : 
Select and explain. 
A. Anti oestrogenic, B. Not a teratogen, C. Long acting pill, D. Failure is 10 per 100 women years
D: Failure is 10 per 100 women years
Answer: D: Failure is 10 per 100 women years 
Explanation: Failure is 10 per 100 women years