This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ecotopic Pregnancy, Subject name: Gynaecology & Obstetrics
Highest risk of ectopic pregnancy is with: 
Select and explain. 
A. Intrauterine device, B. Surgery for previous ectopic, C. Salpingitis, D. Salpingitis isthmica nodosa
B: Surgery for previous ectopic
Answer: B: Surgery for previous ectopic 
Explanation: Ans. is b. i.e. Surgery for previous ectopic(Ref: William Obs 25/e Pg 371)Surgeries for a prior tubal pregnancy for fertility restoration or for sterilization confer highest risk of Ectopic. William Obs 25/e pg 371