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 lasts longer in : 
Select and explain. 
A. Interstitial, B. Isthumoampullary, C. Isthmic, D. Am pullary
A: Interstitial
Answer: A: Interstitial 
Explanation: Interstitial