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': 'A 20 year old girl was raped around 13th day of her regular cycle. The best possible emergency conctraception to be offered would be : \nSelect and explain. \nA. Centchroan tables, B. Cu-T inseion, C. Levonorgestrel tablets, D. Ethinylestradiol tablets', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Levonorgestrel tablets', 'role': 'assistant'}]