This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Natural Methods, Barrier Methods, IUDs, OCPs, Subject name: Social & Preventive Medicine
[{'content': 'Most effective contraceptive for a healthy newly married couple is: \nSelect and explain. \nA. OCP, B. Progesterone only pills, C. IUCD, D. Condoms', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Combined OCP are best contraceptive for a newly married couple to delay first child bih as much as possoible', 'role': 'assistant'}]