This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
All of the following are causes of duodenal obstruction syndrome, Except 
Select and explain. 
A. Malnutrition, B. High attachment of mesentery, C. Long mesentery, D. Pancreatic cancer
A: Malnutrition
Answer: A: Malnutrition 
Explanation: Duodenal obstruction syndrome can be due to causes such as high attachment of mesentery, unusually long mesentery, and also in pancreatic cancer. ref : SRB&;s manual of surgery,3 rd ed,pg no 702