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