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': 'In acute renal failure, metabolic acidosis is due to \nSelect and explain. \nA. Loss of HCO3, B. Increased H+ excretion, C. Diuretic therapy, D. Decreased production of bicarbonate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]