This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Which of the following drains directly into inferior vena cava? 
Select and explain. 
A. Superior mesenteric vein, B. Inferior mesenteric vein, C. Right suprarenal vein, D. Renal vein
C: Right suprarenal vein
Answer: C: Right suprarenal vein 
Explanation: Left testicular/ovarian/suprarenal vein drain into left renal vein before entering into IVC, whereas right testicular/ovarian /suprarenal & both renal veins drain into IVC Ref: Gray's 39e/p1026