This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chronic Kidney Disease & Diabetic Nephropathy, Subject name: Medicine
[{'content': 'Which of the following is used for staging of CKD? \nSelect and explain. \nA. e-GFR and serum creatinine, B. e-GFR and serum albumin, C. e-GFR and urine output/d, D. e-GFR and albuminuria', 'role': 'user'}, {'content': 'Answer: D \nExplanation: e-GFR and albuminuria- used for staging of CKD', 'role': 'assistant'}]