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': 'The glomerular filtration rate of the human kidney may be determined by measuring the plasma clearance of: \nSelect and explain. \nA. PAH, B. Urea, C. Inulin, D. Glucose', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]