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: Unknown
Which of the following is not a constituent of mesorectum? 
Select and explain. 
A. Pararectal lymph nodes, B. Inferior rectal artery, C. Middle rectal vein, D. Inferior mesenteric plexus
B: Inferior rectal artery
Answer: B: Inferior rectal artery 
Explanation: (Refer: Gray’s Anatomy for Students, 1st edition, pg no: 418)
Mesorectal Fascia
 It contains:

Superior rectal artery and its branches.
Superior rectal vein and tributaries.
Lymphatic vessels and nodes along the superior rectal artery.
Branches from the inferior mesenteric plexus which descend to innervate the rectum.
Loose adipose connective tissue.