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
Commonest site of feilization is : 
Select and explain. 
A. lsthmic, B. Ampulla, C. lnfundibulum, D. lnterstitial
B: Ampulla
Answer: B: Ampulla 
Explanation: Ampulla