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: Radiology
[{'content': "Couinaud's segments are used to divide which organ – \nSelect and explain. \nA. Liver, B. Lung, C. Spleen, D. Kidney", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Systems used to describe segmental anatomy of liver :- Couinaud - Bismuth (most common); Brisbane; Goldsmith & Woodburne.', 'role': 'assistant'}]