This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contraceptives, Subject name: Gynaecology & Obstetrics
[{'content': 'The Failure rate of male condom is: \nSelect and explain. \nA. 0.50%, B. 2-18%, C. 2-4%, D. 18-28%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Condoms are barrier method of contraception. Total condom failure rates (breakage and slippage rate combined) can range from 2 to 18 % Contraceptive efficacy of the male condom is enhanced appreciably by areservoir tip and by the addition of a spermicide. Such agents, as well asthose used for lubrication, should be water-based because oil-based productsdegrade latex condoms and diaphragms.', 'role': 'assistant'}]