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
Life span of Cu-T- 380A 
Select and explain. 
A. 10 years, B. 20 years, C. 1 years, D. 5 years
A: 10 years
Answer: A: 10 years 
Explanation: Cu-T- 380A is approved for 10 years but it has been demonstrated to maintain its efficacy for at least 12 years of use Reference : Park&;s textbook of preventive and social medicine, 23rd edition, Page no: 497