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': "Third generation IUCD ? \nSelect and explain. \nA. Mirena, B. Nova-T, C. Lippe's loop, D. CuT-200", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Mirena", 'role': 'assistant'}]