This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
Inferior mesenteric vein drains into 
Select and explain. 
A. Splenic vein, B. Renal vein, C. Inferior vena cava, D. Superior mesenteric vein
A: Splenic vein
Answer: A: Splenic vein 
Explanation: Inferior mesenteric vein usually terminates when reaching the splenic vein, which goes on to form the poal vein with the superior mesenteric vein (SMV).