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: Surgery
[{'content': "The caudate lobe of liver corresponds to which segment of Counaud's classification : \nSelect and explain. \nA. Segment I, B. Segment II, C. Segment III, D. Segment IV", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Caudate lobe is segment I\nQuadrate lobe is segment IVa\nThe caudate lobe (segment I) is the dorsal portion of the liver and embraces the IVC. It lies posterior to the left portal triad inferiorly and left and middle hepatic vein superiorly.\n\nCaudate lobe is unique in sense that\n\nit receives blood supply from both the right & left portal pedicles.\nbile ducts drain into both right & left hepatic ducts.\nits venous drainage is directly into the vena cava', 'role': 'assistant'}]