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 the following fluid should not be used in first 24 hrs after operation: 
Select and explain. 
A. 5% dextrose., B. Isotonic saline, C. Ringer's lactate, D. All of the above
B: Isotonic saline
Answer: B: Isotonic saline 
Explanation: None