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
Best indicator to determine fluid required in hypovolemic patient is 
Select and explain. 
A. PCWP, B. CVP, C. Intra arterial BP, D. 2D echo
A: PCWP
Answer: A: PCWP 
Explanation: Best Indicator to determine fluid required is PCWP