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: Medicine
A child suffering from acute diarrhoea is brought to the casualty and is diagnosed as having severe dehydration with pH of 7.23. Serum Na-125, Serum K-3, HCO3 16. The best I.V. fluid of choice is - 
Select and explain. 
A. 3% Saline, B. N/3 Saline + 10% dextrose, C. Normal saline, D. N/3 saline + 5% dextrose
C: Normal saline
Answer: C: Normal saline 
Explanation: None