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
A patient is suffering from dehydration secondary to diarrhea. Which of the following intravenous agent is used in this case? 
Select and explain. 
A. 10% glucose solution, B. Distilled water, C. 0.9% saline, D. 5% glucose solution
C: 0.9% saline
Answer: C: 0.9% saline 
Explanation: None