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': 'Best indicator to determine fluid required in hypovolemic patient is \nSelect and explain. \nA. PCWP, B. CVP, C. Intra arterial BP, D. 2D echo', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Best Indicator to determine fluid required is PCWP', 'role': 'assistant'}]