This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen & Pelvis, Subject name: Anatomy
[{'content': 'Choose the appropriate lettered structure in this CT scan of the abdomen at the level of the upper lumbar vertebra. Which structure runs behind the IVC? \nSelect and explain. \nA. A, B. B, C. C, D. D', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (c) The right renal artery arises from the aorta, is longer than the left renal artery, and runs behind the IVC and the right renal vein.', 'role': 'assistant'}]