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': 'Mirena is a \nSelect and explain. \nA. Progesterone IUCD, B. Antiprogesterone, C. Used in abortions, D. Hormonal implant', 'role': 'user'}, {'content': 'Answer: A \nExplanation: LNG-IUS or Mirena\nIt is a levanorgestrel releasing device\nIt contains about 52 mg of levanorgestrel released at a rate approximately 20 microgram per day', 'role': 'assistant'}]