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: Physiology
Which is the most common site of feilization in the female reproductive tract? 
Select and explain. 
A. Cervix, B. Ampulla, C. Fimbriae, D. Uterus
B: Ampulla
Answer: B: Ampulla 
Explanation: The middle segment of fallopian tube called the ampulla is the widest and longest segment. It contains extensive branched mucosal folds and is the commonest site of feilization.