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': 'IUD Cu 7380A life span is : \nSelect and explain. \nA. 1 year, B. 4 year, C. 5 year, D. 10 year', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 10 year', 'role': 'assistant'}]