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
Plasma volume is measured by ? 
Select and explain. 
A. Inulin, B. Evans blue, C. Mannitol, D. D2O
B: Evans blue
Answer: B: Evans blue 
Explanation: Ans. is 'b' i.e., Evans blue