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: Unknown
Untrue about 3rd part of duodenum is - 
Select and explain. 
A. 10 cm in length, B. Derived from foregut, C. Superior mesenteric artery passes anterior to it, D. Lying posterior are inferior vena cava and aorta
B: Derived from foregut
Answer: B: Derived from foregut 
Explanation: Ans B