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': 'The right adrenal vein drains into - \nSelect and explain. \nA. Right renal vein, B. Inferior vena cava, C. Second right lumbar vein, D. Third right lumbar vein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Right suprarenal (adrenal) vein drains into IVC and left one into left renal vein.', 'role': 'assistant'}]