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: Pediatrics
GFR of stage 3 chronic kidney disease is 
Select and explain. 
A. 40ml/min/1.73m2, B. 60ml/min/1.73m2, C. 25ml/min/1.73m2, D. None of the above
A: 40ml/min/1.73m2
Answer: A: 40ml/min/1.73m2 
Explanation: Stages of CKD :



Stage
Description
GFR (ml/min/1.73m2)


1
Kidney damage with normal or increased GFR
>90


2
Kidney damage with mild decrease in GFR
60-89


3
Moderate decrease in GFR
30-59


4
severe decrease in GFR
5-29


5
Kidney failure 
<15 or an dialysis