A.GFR>50ml/minCr<178μmol/L(<2mg/dl)B.GFR<50ml/minCr>178μmol/L(>2mg/dl)C.GFR<25ml/minCr>450μmol/LC>Smg/dl)D.GFR<15ml/minCr>607μmol/L(>7mg/dl)E.GFR<10ml/minCr>884μmol/L(>10mg/dl)