This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contraceptives, Subject name: Gynaecology & Obstetrics
[{'content': 'For effective protection after unprotected intercourse, one single tablet of levonorgestrel 0.75 mg is taken already, when to take next tablet? \nSelect and explain. \nA. 1 tablet after 24 hours, B. 1 tablet after 12 hours, C. 2 tablet after 24 hours, D. 2 tablet after 12 hours', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ANS. BEmergency contraception:1. Yuzpe method (within 72 hours: High dose OCP 2 + 2 (12 hours apart) or low dose OCP 4 + 4 (12 hours apart).2. LNG 0.75 mg 1 tab immediately, 2nd tab after 12 hours.3. Mifepristone (RU 486).4. Ulipristal 30 mg tab--5 days.5. Copper-TIUDImages of copper containing IUDCU-T380AImage of Mirena (total LNG is 52 mg and is released at a rate of 20 mg/ day for a period of 5 years)', 'role': 'assistant'}]