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: Gynaecology & Obstetrics
Which one of the following casues the greatest risk of ecotpic pregnancy : 
Select and explain. 
A. Pelvic inf!amatory disease, B. IUD use, C. Previous ectopic pergnancy, D. Previous MTP
C: Previous ectopic pergnancy
Answer: C: Previous ectopic pergnancy 
Explanation: Ans. is c i.e. Previous ectopic pregnancy "Prior tuba/ damage, either from a previous ectopic pregnancy or from tuba! surgery to relieve infeility or for sterilization, confers the highest risk of ectopic pregnancy".