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
All of the following structures forms the boundries of epiploic foramen, EXCEPT: 
Select and explain. 
A. Caudate process of liver, B. Inferior vena cava, C. 4th pa duodenum, D. Free border of lesser omentum
C: 4th pa duodenum
Answer: C: 4th pa duodenum 
Explanation: Epiploic foramen also known as foramen of winslow is a veical slit like opening, through which the lesser sac communicates with the greater sac.Boundaries of the epiploic formen:Anteriorly: by lesser omentum containing poal vein, hepatic aery and bile duct.Posteriorly: suprarenal gland inferior vena cava and T12 veebra.Superiorly: caudate lobe of liver.Inferiorly: 1st pa of duodenum and hepatic aery.Ref: Cunningham's textbook of anatomy, By Daniel John Cunningham, Page 1239