This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
The polysaccharide used in assessing the glomerular filtration rate (GFR) is: 
Select and explain. 
A. Glycogen, B. Agar, C. Inulin, D. Hyaluronic acid
C: Inulin
Answer: C: Inulin 
Explanation: Ans. C. InulinInulin is a fructosan, isolated from root tubers of Dahlia. It is used for assessing GFR. The test is known as Inulin Clearance test.