Which of the following is not used for emergency contraception?

Emergency contraception should be given within 72 hours of unprotected sex. They interfere with postovulatory events which normally results in pregnancy and therefore known as incentives - As the most common method and drug is - levonorgestrel with success rate of 95 %.the tablets can be offered up to 120 hours. however, sooner the tablets taken after intercourse is more effective and most effective method is IUCD as it is given by the doctor itself to inject the IUCD and the failure rate is 0.1% Mifepristone is a steroid for progesterone receptor. It does not prevent feilization but by blocking the action of progesterone on the endometrium, it causes sloughing and shedding of decidua and prevents implanatation. Danazol is contraceptive drug it is anti - estrogenic in nature but it is not the best drug because of the failure rate chance of this drug and if mother is having female fetus it can cause virilization of unborn female child.