This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Shock, Subject name: Surgery
[{'content': 'Optimum urine output in post-operative patient:- \nSelect and explain. \nA. 1 ml/kg, B. 2 ml/kg, C. 3 ml/kg, D. 4 ml/kg', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Urine output of more than 1 mL/kg is an adequate measure of renal perfusion in the absence of underlying renal disease.', 'role': 'assistant'}]