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
[{'content': 'Lesser omentum has following contents except - \nSelect and explain. \nA. Hepatic vein, B. Hepatic artery, C. Portal vein, D. Bile duct', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Right free margin of lesser omentum contains :-\n\n\nHepatic artery proper,\nPortal vein,\nBile duct,\nLymph nodes & lymphatics, and\nHepatic plexus of nerves.', 'role': 'assistant'}]