Superior rectal vein drains into-
Inferior mesenteric vein
External iliac vein
Internal iliac vein
Internal pudendal vein
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.
Blood Vessels of Abdomen and Pelvis