<prompt> The contraceptive method with a failure rate of 3 is :Copper-TVaginal spongeCondomOral contraceptive pills  <response>: The oral contraceptives are highly effective contraceptive methodThe failure rate is very low 0.3 co , as ovulation is inhibitedRef: TEXTBOOK OF GYNAECOLOGY; Sheila Balakrishnan; SECOND EDITION; PAGE NO 366, 370 