This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidneys and Body Fluids, Subject name: Physiology
[{'content': 'Glomerular filtration rate is best estimated by which of the following: \nSelect and explain. \nA. MSA, B. Inulin clearance, C. Hippuric acid, D. Creatinine clearance', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Inulin clearanceThe GFR can be measured by measuring the excretion and plasma level of a substance that is:i. Freely filtered through glomeruliii. Not secreted by renal tubulesiii. Not reabsorbed by renal tubulesiv. Not stored in kidneyv. Nontoxicvi. Has no effect on GFRINULIN is a product of Dahlia Tubers It is a polymer of fructose with a molecular weight of 5200 which meets the above criteria and is best for measuring GFR Normal GFR of an average man is 125 ml/minute', 'role': 'assistant'}]