This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
ECF best value is given by 
Select and explain. 
A. Mannitol, B. Inulin, C. D2O, D. Evan's blue
B: Inulin
Answer: B: Inulin 
Explanation: ECF volume is measured using inulin which is a polysaccharide.(Ref: Textbook of physiology N Geetha 2nd edition page no.61)