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: Anatomy
All are derivatives of midgut, EXCEPT: 
Select and explain. 
A. Ascending colon, B. Appendix, C. Jejunum, D. Descending colon
D: Descending colon
Answer: D: Descending colon 
Explanation: The midgut is divided into two regions at the omphalo-enteric duct ("yolk stalk"): the cranial and caudal limbs. The derivatives of the cranial limb include the distal duodenum, jejunum, and proximal ileum. The derivatives of the caudal limb include the distal ileum, cecum, appendix, ascending colon, and proximal 2/3 of transverse colon.