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
Longest pa of the fallopian tube is : 
Select and explain. 
A. Interstitial poion, B. Ampulla, C. Infundibulum, D. Isthmus
B: Ampulla
Answer: B: Ampulla 
Explanation: Ampulla