Within how many hours after unprotected intercourse should an emergency contraceptive pill be taken to reduce the chance of pregnancy?

Correct option is C

Emergency contraceptive pills (ECPs) should be taken within 72 hours (3 days) of unprotected intercourse to effectively prevent pregnancy. Some newer pills, like Ulipristal acetate (Ella), can work up to 120 hours (5 days), but levonorgestrel-based pills are most effective within 72 hours. The sooner the pill is taken, the higher its effectiveness.
Explanation of Options:
· (a) 24 hours: Taking it within 24 hours increases effectiveness but is not the maximum allowable time.
· (b) 48 hours: Effective, but 72 hours is the standard recommendation for most pills.
· (c) 72 hours: Correct answer; emergency contraception works best within this period.
· (d) 120 hours: Some pills like Ulipristal acetate work up to 120 hours, but most commonly used pills are recommended within 72 hours.