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: Surgery
[{'content': 'The preferred Shunt procedure for the patient with portal\nhypertension having acceptable operative risk and adequate\nliver function is \nSelect and explain. \nA. End to Side Porto caval Shunt, B. Side to Side Porto Caval Shunt, C. Mesocaval Shunt, D. Distal Spleno renal Shunt', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]