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
Ectopic pregnancy is most common in : 
Select and explain. 
A. Previous h/o recurrent PID, B. Previous h/o Aboion, C. Previous h/o Twin pregnancy, D. Endometriosis
A: Previous h/o recurrent PID
Answer: A: Previous h/o recurrent PID 
Explanation: Previous h/o recurrent PID