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
[{'content': 'Drugs used in emergency contraception are all except : \nSelect and explain. \nA. Levonorgestrel, B. Estrogen + progesterone, C. Danazol, D. Mifepristone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Danazol is not used as an emergency contraceptive. It is used in the medical treatment of endometriosis. OXFORD HANDBOOK OF OBSTETRICS AND GYNAECOLOGY THIRD EDITION PAGE NO 587', 'role': 'assistant'}]