This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
[{'content': 'The most common cause of chronic renal failure is- \nSelect and explain. \nA. Diabetes mellitus, B. Hypeension, C. Glomerular diseases, D. Interstitial diseases', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Diabetic nephropathy is the single most common cause of chronic renal failure, accounting for 45%of patients receiving renal replacement therapy . Ref:Harrison 20th edition pg no .2144', 'role': 'assistant'}]