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: Physiology
The largest fraction of the total body fluid is: 
Select and explain. 
A. Extracellular fluid, B. Intracellular fluid, C. Plasma, D. Whole blood
B: Intracellular fluid
Answer: B: Intracellular fluid 
Explanation: None