This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Body fluid compaments, Subject name: Physiology
[{'content': '1.5 mL of a solution containing 20 mg/mL of Evans blue dye is injected into plasma, the final concentration of the dye is 0.015 mg/mL, the volume of the plasma is: \nSelect and explain. \nA. 1 L, B. 2 L, C. 3 L, D. 4 L', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Volume of plasma = volume of dye injected / final concentration of the dye Volume of dye injected = 1.5 * 20 = 30 mg Volume of plasma = 30/0.015 = 2000 mL', 'role': 'assistant'}]