This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'The operation that precipitates poosystemic encephalopathy is \nSelect and explain. \nA. Splenorenul shunt, B. Siguira operation, C. Talma - Marison Operation, D. Poacaval anastomosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Poosystemic encephalopathy is a neuropsychiatric syndrome, It most often results from high gut protein or acute metabolic stress (eg, GI bleeding, infection, electrolyte abnormality) in a patient with poosystemic shunting. In poosystemic shunting, absorbed products that would otherwise be detoxified by the liver enter the systemic circulation and reach the brain, causing toxicity, paicularly to the cerebral coex.', 'role': 'assistant'}]