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: Medicine
Rifle Classification is for : 
Select and explain. 
A. Acute kidney injury, B. Chronic kidney disease, C. Diabetic Nephropathy, D. Amyloidsis
A: Acute kidney injury
Answer: A: Acute kidney injury 
Explanation: RIFLE - AKI.
KDIGO Classification - CKD.