A nurse is reviewing the BUN and creatinine levels of an older adult client who has chronic kidney disease. The nurse should expect which of the following findings?

BUN levels range 8 to 24 mg/dl

Creatinine levels range 0.7 to 1.3mg/dl

BUN 45 mg/dL and creatinine 8 mg/dL.

BUN 10 mg/dL and creatinine 0.3 mg/dL

OBUN 23 mg/dL and creatinine 1.0 mg/dl.