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
All of the following are causes of granular contracted kidney except - 
Select and explain. 
A. Benign nephrosclerosis, B. Chronic pyelonephritis, C. Diabetes mellitus, D. Chronic glomerulonephritis
C: Diabetes mellitus
Answer: C: Diabetes mellitus 
Explanation: None