This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
For emergency contraception IUD must be inserted 
Select and explain. 
A. Immediately, B. Within 5 days of coitus, C. Within 7 days of coitus, D. IUD is not used as emergency contraception
B: Within 5 days of coitus
Answer: B: Within 5 days of coitus 
Explanation: None