This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal physiology, Subject name: Physiology
[{'content': 'Which of the following product is primarily filtered with little secretion or reabsorption in renal tubules? \nSelect and explain. \nA. Sodium, B. Inulin, C. Glucose, D. Amino acids', 'role': 'user'}, {'content': "Answer: B \nExplanation: In addition to the requirement that it be freely filtered and neither reabsorbed nor secreted in the tubules, a substance suitable for measuring the GFR should be nontoxic and not metabolized by the body. Inulin, a polymer of fructose with a molecular weight of 5200 that is found in Jerusalem aichokes (Helianthus tuberosus), meets these criteria in humans and most animals and is extensively used to measure GFR.Ref: Ganong's review of Medical Physiology, 23rd edition, Page no: 645", 'role': 'assistant'}]