This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Excretory System (Kidney, Bladder) Acid-Base Balance, Subject name: Physiology
[{'content': 'Most accurate measurement of extracellular fluid volume (ECF) can be done by using: \nSelect and explain. \nA. Sucrose, B. Mannitol, C. Inulin, D. Aminopyrine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: -Antipyrine or Aminopyrine is used for TBW measurement. Hence, option D is ruled out. -No ideal marker for ECF measurement is available. -Among the given options, most accurate measurement of ECF volume is that obtained by using Inulin.', 'role': 'assistant'}]