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
The internal pudendal artery supplies which of the following 
Select and explain. 
A. Proximal vagina, B. Distal vaginal walls, C. Posterior vaginal wall, D. Bladder trigone
B: Distal vaginal walls
Answer: B: Distal vaginal walls 
Explanation: Proximal vagina → 

Cervical branch of uterine artery
Vaginal artery

Posterior vaginal wall → Middle rectal artery
Distal vaginal wall → Internal pudendal artery.