This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peritoneum & GI Tract, Subject name: Anatomy
Communicating opening between greater sac and lesser sac- 
Select and explain. 
A. Foramen of winslow, B. Foramen of Monro, C. Hepatorenal pouch, D. Pouch of Douglas
A: Foramen of winslow
Answer: A: Foramen of winslow 
Explanation: Ans. is 'a' i.e., Foramen of winslow o Epiploic foramen (foramen of winslow or aditus to lesser sac) is a slit-like opening through which lesser sac communicates w ith greater sac. It is situated at the level of T12 vertebra. Its boundries areAnterior :- Right free margin of lesser omentum (contains portal vein, hepatic artery proper and bile duct).Posterior :- IVC, right suprarenal gland and T12 vertebra.Superior :- Caudate lobe of liver.Inferior :- 1st part of duodenum and horizontal part of hepatic artery.