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': 'The chronic renal failure is most commonly associated with: \nSelect and explain. \nA. Respiratory alkalosis, B. Metabolic acidosis, C. Hypoxia, D. Respiratory acidosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]