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
Plasma volume is best evaluated by using 
Select and explain. 
A. Evan blue, B. Inulin, C. Mannitol, D. Radiolabelled water
A: Evan blue
Answer: A: Evan blue 
Explanation: Plasma volume is measured using dyes like Evans blur that binds specifically to plasma proteins.(Ref: Textbook of physiology N Geetha 2nd edition page no.62)