This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Large Intestine, Rectum, and Anal canal, Subject name: Anatomy
Part of colon w ith no mesentery - 
Select and explain. 
A. Transverse colon, B. Sigmoid colon, C. Ascending colon, D. Rectum
C: Ascending colon
Answer: C: Ascending colon 
Explanation: Ans. is 'c' i.e., Ascending colonMesenteries in intestineMesentery properMesentery of small intestine (jejunum and ileum) is fan shaped double layered peritoneal fold which suspends the coils of jejunum and ileum. Mesentery' hasAttached border (root of mesentery)It is 15 cm long and extends from duodenojejunal flexure (on left side of L2) to upper part of right sacroiliac joint. Root of mesenteiy crosses following structures(i) 3rdpart (horizontal part) of duodenum, (ii) abdominal aortat, (iii) IVC, (iv) right ureter, and (v) right psoas major:Free border (intestinal border)It is 6 meters long and is attached to gut forming its visceral peritoneum (serous coat).# Contents of mesentery are(i) Jejunal and ileal branches of superior mensentric vessels; (ii) Autonomic nerve plexuses; (iii) Lymphatics and lymph nodes and (iv) Connective tissue with fat.Transverse mesocolon It connects transverse colon to posterior abdominal wrall and contains middle colic vessels.Mesoappendix It connects the appendix to the ileal mesentery' and contains appendicular vessels.Sigmoid mesocolonIt connects sigmoid colon to posterior pelvic wall and contains sigmoid vessels.Mesorectum : It contains superior rectal vessels (artery' & veins) with their branches, lymphatic vessels and lymph nodes along superior rectal artery', and branches from inferior mesenteric plexus.