This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other FP Methods and New Initiatives in Family Planning, Subject name: Social & Preventive Medicine
[{'content': 'Most cost effective family planning method is:- \nSelect and explain. \nA. Vasectomy, B. Tubectomy, C. Copper T, D. Oral pills', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sterilization is the most cost-effective contraceptive measure. - Vasectomy is most effective sterilization method than tubectomy. - Cost wise ratio is 5 vasectomies to 1 tubectomy.', 'role': 'assistant'}]