This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
Which of the following progesterone is used in emergency contraception? 
Select and explain. 
A. Levonorgesterol, B. Microised Progesterone, C. Norgesterone, D. Depot Medroxyprogesterone acetate
A: Levonorgesterol
Answer: A: Levonorgesterol 
Explanation: Levonorgestrel 0.75mg two doses12 hours apa, or 1.5mg single dose taken as soon as possible, but before 72 hours of unprotected intercourse. other emergency contraceptives- mifepristone, ulipristal (Ref.Essentials of medical pharmacology TD Tripathi 7th edition page no.322)