This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small Intestine, Subject name: Anatomy
Third part of duodenum is crossed by? 
Select and explain. 
A. Portal vein, B. Hepatic artery, C. Bile duct, D. Superior mesenteric artery
D: Superior mesenteric artery
Answer: D: Superior mesenteric artery 
Explanation: Ans. (d) Superior mesenteric arteryRef: Gray's Anatomy 40th ed. chapter 66