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
[{'content': 'Granular contracted kidneyon one side and normal kidney on other side is suggestive of : \nSelect and explain. \nA. Chronic pyelonephritis, B. Polycystic kidney disease, C. RAS(Renal aery stenosis), D. Tuberculosis of kidney', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Chronic pyelonephritis', 'role': 'assistant'}]