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
[{'content': 'Which of the following drains directly into inferior vena cava? \nSelect and explain. \nA. Superior mesenteric vein, B. Inferior mesenteric vein, C. Right suprarenal vein, D. Renal vein', 'role': 'user'}, {'content': "Answer: C \nExplanation: 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", 'role': 'assistant'}]