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
Least clearance is for among these 
Select and explain. 
A. Glucose, B. Inulin, C. Urea, D. Creatinine
A: Glucose
Answer: A: Glucose 
Explanation: Glucose is completely reabsorbed in proximal tubules. So its clearance is zero.