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': 'Half life of Cu-T 380A is: March 2012 \nSelect and explain. \nA. 2 years, B. 3 years, C. 5 years, D. 10 years', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: D i.e. 10 years Half life of IUCD Nova T has silver added to the copper wire thereby increasing its lifespan to 5 years Copper T 380A known as Paraguard has a lifespan of 10 years', 'role': 'assistant'}]