The contraceptive method with a failure rate of <3 is :
The oral contraceptives are highly effective contraceptive methodThe failure rate is very low ( 0.3 c/o ), as ovulation is inhibitedRef: TEXTBOOK OF GYNAECOLOGY; Sheila Balakrishnan; SECOND EDITION; PAGE NO 366, 370
Copper-T
Vaginal sponge
Condom
Oral contraceptive pills
Contraception