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: Surgery
All are true regarding superior Mesenteric Artery Syndrome, except - 
Select and explain. 
A. Caused by compression of distended duodenum, B. Common in young females, C. Does not occur in obese individuals, D. Most common in 6th - 7th decade
D: Most common in 6th - 7th decade
Answer: D: Most common in 6th - 7th decade 
Explanation: • Vascular compression of third portion of the duodenum by the superior mesenteric artery as it passes over this portion of the duodenum.
• Also known as Wilkie’s syndrome, cast syndrome, and arteriomesenteric duodenal ileus or compression.
• An abnormally narrow, aortomesenteric angle..
• An abnormally highly fixed transverse duodenum.
• An abnormal course of the mesenteric artery continuing inferiorly, anterior to the unyielding vertebral column.
• Most commonly seen in young asthenic individuals, with women being more commonly affected than men.
• SMA normally leaves aorta at an acute angle (50 - 60°).
• Normally a mass of fat and lymphatics near origin of SMA is believed to protect duodenum from compression.