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
Left testicular vein drains into which of the following? 
Select and explain. 
A. Left renal vein, B. Inferior vena cava, C. Common iliac vein, D. Internal iliac vein
A: Left renal vein
Answer: A: Left renal vein 
Explanation: 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.