This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
[{'content': 'In Emergency contraception which progesterone is used \nSelect and explain. \nA. Norethisterone, B. Medroxyprogesterone, C. Desogestrel, D. Levonorgestrol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In India, levonorgestrel 0.75 mg tablet is approved for emergency contraception It is used as one tablet of 0.75 mg within 72 hours of unprotected sex and the second tablet after 12 hours of first dose Reference : Park&;s textbook of preventive and social medicine, 23rd edition, Page no: 501', 'role': 'assistant'}]