<prompt> A female wanted to have an emergency contraception after an unprotected intercourse. Which of these is NOT useful as an emergency contraceptive?LNG IUDOral MifepristoneOral LevonorgestrelCu-containing IUD  <response>: Post coital or emergency contraceptives are, Ethinyl oestradiol Conjugated estrogen Ethinyl oestradiol Norgestrel Levonorgestrel Mifepristone Copper IUDs Ref: Textbook of Obstetrics by D.C. Dutta, 6th edition, Page 550. 