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
All are causes of Granular Contracted kidneys, except: 
Select and explain. 
A. Benign nephrosclerosis, B. Diabetes mellitus, C. Chronic PyeloNephritis, D. Chronic GlomeruloNephritis
B: Diabetes mellitus
Answer: B: Diabetes mellitus 
Explanation: Diabetes mellitus