This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'Portocaval (portosystemic) anastomosis is seen at all except - \nSelect and explain. \nA. Esophagus, B. Liver, C. Rectum, D. Duodenum', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans is 'd' i.e.. Duodenum Portocaval anastomosesSitePortalSystemicEsophagusEsophageal tributaries of left gastricHemizygousRectumSuperior rectalMiddle and inferior rectal ParaumbilicalAbove--superior epigastric and lateral thoracicRetroperitoneumSplenic, colicBelow--superficial epigastricSides--posterior intercostal and lumbarLeft renal and other tributaries of inferior venaBare area of liverPortal radicles of livercava (veins of Retzius)Diaphragmatic veinsFalciform ligamentParaumbilicalDiaphragmatic veins by an accessory portal system ofFissure for a Left branch of portal veinSappeyInferior vena cava via ductus venosusligamentum venosumPosterior vaginal wallSuperior rectalVaginal venous plexus", 'role': 'assistant'}]