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': 'Poosystemic shunt is not sent in \nSelect and explain. \nA. Liverpool, B. Spleen, C. Anorectum, D. Gastrointestinal Esophageal', 'role': 'user'}, {'content': "Answer: B \nExplanation: At the liver, hepatic sinusoids& superior epigastric veins are forming poocaval anastomosis, at rectum superior rectal&middle, inferior rectal vein forms, at oesophagus between left gastric and azygos vein. Ref: Gray's 39e/p1026", 'role': 'assistant'}]