This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': "Yuzpe and Lance regimen for 'post -- coital' contraception : \nSelect and explain. \nA. 100 mg of ethinyl oestradiol and 0.5 mg of levonoregestel initially followed by the same dose after 12 hours, B. Same as above but followed by same dose after 24 hours, C. Use of 150 mg of DMPA every 3 months, D. 200 mg NET -- EN every 60 days", 'role': 'user'}, {'content': 'Answer: A \nExplanation: 100 mg of ethinyl oestradiol and 0.5 mg of levonoregestel initially followed by the same dose after 12 hours', 'role': 'assistant'}]