This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development of GU system and Neuro-vascular supply of pelvis & perineum, Subject name: Anatomy
Anal canal is NOT supplied by 
Select and explain. 
A. Superior rectal aery, B. Inferior rectal aery, C. Median sacral aery, D. Middle rectal aery
D: Middle rectal aery
Answer: D: Middle rectal aery 
Explanation: Middle rectal aery supplies the rectum, but 'not' the anal canal.