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
[{'content': 'What is the most common cause of chronic renal failure? \nSelect and explain. \nA. Glomerulonephritis (acute to chronic), B. Chronic pyelonephritis, C. Diabetes mellitus, D. Hypeensive renal disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The most common cause of chronic renal failure is diabetes mellitus, not glomerulonephritis. Foy percent of patients with Type I diabetes mellitus eventually develop diabetic nephropathy chronic renal failure. Twenty percent of patients with Type II diabetes mellitus develop diabetic nephropathy and subsequent chronic renal failure. Ref: Obrador G.T. (2009). Chapter 17. Chronic Renal Failure & the Uremic Syndrome. In E.V. Lerma, J.S. Berns, A.R. Nissenson (Eds), CURRENT Diagnosis & Treatment: Nephrology & Hypeension.', 'role': 'assistant'}]