<prompt> The most effective contraceptive available is:Combined Oral contraceptive pillProgestin injectableThird generation IUCDCentchroman  <response>: - Amongst the choices, third generation is most effective with a failure rate of only 0.2HWY. PEARL INDEX OF DIFFERENT CONTRACEPTIONS: Male condoms 2-14 HWY Female condoms 5-21 HWY Centchroman 1.84 - 2.84 HWY OCPs 0.1 - 2 HWY Sterilization 0.1 HWY Vaginal sponge 9-20 HWY 