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: Pathology
Granular contracted kidneyon one side and normal kidney on other side is suggestive of : 
Select and explain. 
A. Chronic pyelonephritis, B. Polycystic kidney disease, C. RAS(Renal aery stenosis), D. Tuberculosis of kidney
A: Chronic pyelonephritis
Answer: A: Chronic pyelonephritis 
Explanation: Chronic pyelonephritis