system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Superior rectal vein drains into-
assistant
The correct answer is  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.