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
Renal papillary necrosis is almost always associated with one of the following conditions: March 2004 
Select and explain. 
A. Diabetes mellitus, B. Analgesic nephropathy, C. Chronic pyelonephritis, D. Post streptococcal glomerulonephritis
A: Diabetes mellitus
Answer: A: Diabetes mellitus 
Explanation: Ans. A i.e. Diabetes mellitus