This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluids and Electrolyte Imbalance, Subject name: Medicine
[{'content': 'In chronic renal failure, there is? \nSelect and explain. \nA. Decrease anion gap, B. Normal anion gap, C. Increased anion gap, D. Metabolic alkalosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Chronic renal failure leads to increase anion gap Causes of the increased anion (>12 mEq/L): Milk-alkali syndrome Uremia Diabetic ketoacidosis Propylene glycol Isoniazid intoxication Lactic acidosis Ethanol ethylene glycol Rhabdomyolysis/renal failure Salicylates', 'role': 'assistant'}]