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
[{'content': 'Plasma volume is measured by \nSelect and explain. \nA. Inulin, B. Evans blue, C. Mannitol, D. D2O', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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)', 'role': 'assistant'}]