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': 'To avoid conception, DMPA is given \nSelect and explain. \nA. Monthly, B. Yearly, C. 6 Monthly, D. 3 Monthly', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]