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 measured by 
Select and explain. 
A. Inulin, B. Evans blue, C. Mannitol, D. D2O
B: Evans blue
Answer: B: Evans blue 
Explanation: Plasma volume is measured using dyes like Evans blue that bind specifically to plasma proteins. It will not diffuse into the interstitium. (REF: TEXTBOOK OF MEDICAL PHYSIOLOGY GEETHA N 2 EDITION, PAGE NO - 62)