This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pharmacology
[{'content': 'Total dose of Levonorgestrel for emergency contraception \nSelect and explain. \nA. 1.5mg single pill, B. 1.5 mg pill, C. 7.5 mg single pills, D. O. 25 mg two pills', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer KDT 7tg/e Pg 322 Levonorgestrel 0.75mg two doses 12 hours apa or 1.5mg single dose should be taken within 72 hrs of unprotected intercourse for emergency contraception', 'role': 'assistant'}]