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': 'Best contraceptive for a Newly married healthy couple:- \nSelect and explain. \nA. Barrier method, B. IUCD, C. Oral contraceptive pills, D. Natural methods', 'role': 'user'}, {'content': "Answer: C \nExplanation: Contraceptive choices for a newly married healthy couple Oral contraceptive pills - Low failure rate - Ideal method of choice for newly married healthy couple. Barrier method - Has a high failure rate; only consistent use for 2 years. - Has advantage of HIV/STI protection but a 'healthy' couple may not need it. IUCD - Is not a method of first choice for nulliparous female. Natural methods - Has a high failure rate.", 'role': 'assistant'}]