R Ram Sharma π Coach β 193.88K Points Q. Emergency contraceptives are effective if used within (A) 72 hrs of coitus. (B) 72 hrs of ovulation. (C) 72 hrs of menstruation. (D) 72 hrs of implantation. ποΈ Show Answer π¬ Discuss π Share β Correct Answer: (A) 72 hrs of coitus.