This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contraception, Subject name: Gynaecology & Obstetrics
Which is not an emergency contraceptive : 
Select and explain. 
A. Combined oral pills, B. Estrogen, C. Desogestrel, D. Levonorgestrel
C: Desogestrel
Answer: C: Desogestrel 
Explanation: Emergency contraception: The preparations available include Two tablets of relatively high doses of combined pill containing 100mcg of EE2 and 1 mg norethisterone or 500 mcg LNG taken within 72 hrs of intercourse Others include LNG tablets Mifepristone Ulipristal Centchroman Prostaglandins Copper T IUCD Ref: Shaw Gynecology 17 e pg 270.