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': 'Most common cause of chronic kidney disease \nSelect and explain. \nA. Diabetes mellitus, B. Hypertension, C. PCKD, D. Hepatorenal Syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common cause - Diabetes mellitus', 'role': 'assistant'}]