This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
[{'content': 'Which IUCD acts for 10 years \nSelect and explain. \nA. Cu-T 200 B, B. Nova-T, C. Cu-T 380A, D. Multi load-250', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cu T 308A is approved for use for 10 years However, it is demonstrated to maintain its efficacy over at least 12 years of use Reference: Park&;s textbook of preventive and social medicine, 23rd edition, Page no: 497', 'role': 'assistant'}]