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
Posterior relations of the head of the pancreas include all of the following, except: 
Select and explain. 
A. First pa of the duodenum, B. Common bile duct, C. Inferior vena cava, D. Aoa
A: First pa of the duodenum
Answer: A: First pa of the duodenum 
Explanation: The posterior relations of the head of the pancreas include the common bile duct, inferior vena cava and the right and left renal veins terminating into it. The first pa of the duodenum is an anterior relation of the head of the pancreas.Ref: Clinical Anatomy, By Richard S. Snell, 6th edition, Page 230; Clinical Anatomy (A Problem Solving Approach), By Neeta V Kulkarni, 2nd edition, Page 689.