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': 'Best contraceptive for a young unmarried female is: \nSelect and explain. \nA. Oral pills, B. IUCD, C. Diaphragm, D. Vaginal pessary', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Oral pills', 'role': 'assistant'}]