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: Social & Preventive Medicine
[{'content': 'Not a copper containing IUD ? \nSelect and explain. \nA. CuT-200, B. Nova -T, C. Multiload-250, D. LNG-20', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is `d i.e., LNG-20 LNG-20 is third generation IUD which does not contain cooper. Other three options are 2"d generation (copper containing) IUDs.', 'role': 'assistant'}]