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
Superior rectal vein drains into- 
Select and explain. 
A. Inferior mesenteric vein, B. External iliac vein, C. Internal iliac vein, D. Internal pudendal vein
A: Inferior mesenteric vein
Answer: A: Inferior mesenteric vein 
Explanation: Ans. is 'a' i.e., Inferior mesenteric vein o Superior rectal vein drains into inferior mesenteric vein,o Inferior rectal vein drains into internal pudendal vein.