<prompt> A young female Shagun comes to you in the gynaecology OPD and gives the history that she had intercourse with her boyfriend 5 hours back. Select the drug that can act as a single dose postcoital contraceptive for her:Clomiphene citrateMifepristoneDanazolMedroxyprogesterone acetate  <response>: Single dose of mifepristone taken within 72 hours of unprotected intercourse is an effective method to prevent pregnancy. Two tablets of OCP within 72 hours of unprotected intercourse followed by 2 tablets after 12 hours can also be used as a post-coital contraceptive method. Two tablets of levonorgestrel 075 mg each taken 12 hours apa can also be used for emergency contraception. 