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
In acute renal failure, metabolic acidosis is due to 
Select and explain. 
A. Loss of HCO3, B. Increased H+ excretion, C. Diuretic therapy, D. Decreased production of bicarbonate
A: Loss of HCO3
Answer: A: Loss of HCO3 
Explanation: None