This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
[{'content': 'Which of the following structures is not present in lesser omentum \nSelect and explain. \nA. Poal vein, B. Hepatic aery, C. Bile duct, D. Inferior vena cava', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The lesser omentum is the double layer of peritoneum that extends from the liver to the lessercurvature of the stomach and the first pa of the duodenum. Ref - BDC 6e vol2 pg234', 'role': 'assistant'}]