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': 'Left testicular vein drains into which of the following? \nSelect and explain. \nA. Left renal vein, B. Inferior vena cava, C. Common iliac vein, D. Internal iliac vein', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Left testicular vein drains into left renal vein. Right testicular vein drains into the inferior vena cava at an acute angle just inferior to the level of the renal veins.', 'role': 'assistant'}]