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
Post - coital contraceptive methods include all of the following except : 
Select and explain. 
A. RU - 486, B. Danzol, C. Copper - T inseion, D. Nonoxynol
D: Nonoxynol
Answer: D: Nonoxynol 
Explanation: Nonoxynol