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': 'Implanon contains - \nSelect and explain. \nA. Desonorgestrol, B. Ethinyl estradiol, C. L-norgestrol, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Implanon is a single rod implant.\nThis single rod offers a significant advantage in that it is considerably easier to both insert and remove.\nThe rod is supplied in a sterile disposable applicator and insertion does not require a skin incision. Removal using a pop out’ technique is facilitated by the rigidity of the capsule.', 'role': 'assistant'}]