This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': "In couinaud's classification, segment IV of liver is \nSelect and explain. \nA. Caudate lobe, B. Quadrate lobe, C. Right lobe, D. Left lobe", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Segments nomenclature I Caudate lobe (sometimes subdivided into left and right pas called segment IX) II Left lateral superior segment III left lateral Inferior segment IV left medial segment or Quadrate lobe V Right anterior Inferior segment VI Right posterior Inferior segment VII Right posterior superior segment VIII Right anterior superior segment', 'role': 'assistant'}]