GFR of stage 3 chronic kidney disease is: (A) 40ml/min/1.73m2, (B) 60ml/min/1.73m2, (C) 25ml/min/1.73m2, (D) None of the above
Answer is A. 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