This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood Vessels of Abdomen and Pelvis, Subject name: Anatomy
Left testicular vein drains into? 
Select and explain. 
A. Left renal vein, B. Inferior vena cava, C. Common iliac vei, D. Internal iliac vein
A: Left renal vein
Answer: A: Left renal vein 
Explanation: ANSWER: (A) Left renal veinREF: Gray's anatomy 39th ed p.1307Repeat from June 2011Repeat (**)"The right testicular vein opens into the inferior vena cava at an acute angle just inferior to the level of the renal veins, and the left testicular vein opens into the left renal vein at a right angle"