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
Arterial supply of the duodenum is by - 
Select and explain. 
A. Superior mesenteric artery, B. Celiac artery, C. Inferior mesenteric artery, D. Both superior mesenteric & celiac arteries
D: Both superior mesenteric & celiac arteries
Answer: D: Both superior mesenteric & celiac arteries 
Explanation: Upper part of duodenum (up to opening of bile duct) is derived from foregut and therefore is supplied by Coeliac trunk.
Lower part of duodenum (below the opening of bile duct) is derived from midgut and is supplied by superior mesenteric artery.