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 aery, C. Poal vein, D. Bile duct', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Hepatic vein', 'role': 'assistant'}]