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: Gynaecology & Obstetrics
The contraceptive method with a failure rate of <5 is 
Select and explain. 
A. Oral contraceptive pills, B. Copper-T, C. Vaginal sponge, D. Condom
A: Oral contraceptive pills
Answer: A: Oral contraceptive pills 
Explanation: The oral contraceptives are highly effective contraceptive method
The failure rate is very low ( 0.3℅), as ovulation is inhibited