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
Which of these is the most reliable method for monitoring fluid resuscitation? 
Select and explain. 
A. Urine output, B. CVP, C. Pulse rate, D. Blood pressure
A: Urine output
Answer: A: Urine output 
Explanation: Ans: A. Urine outputGoal of treatment:Restore cellular and organ perfusion.Hence, monitoring of organ perfusion should guide the management of shock.The best measures of organ perfusion and the best monitor of the adequacy of shock therapy remain the urine output.