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': 'Which is the most reliable parameter to assess fluid intake in a poly trauma patient? \nSelect and explain. \nA. Urine output, B. Body temperature, C. BP, D. Pulse rate', 'role': 'user'}, {'content': "Answer: A \nExplanation: CVP is the best measurement but since it's not given here go for urine output can be considered as the next best.", 'role': 'assistant'}]