This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid and electrolytes, Subject name: Medicine
[{'content': "Increased 'anion gap' is not seen in- \nSelect and explain. \nA. Salicylate poisoning, B. Renal tubular acidosis, C. Lactic acidosis, D. Ethylene glycol poisoning", 'role': 'user'}, {'content': 'Answer: B \nExplanation: The most common causes of high anion gap metabolic acidosis are: ketoacidosis, lactic acidosis, renal failure, and toxic ingestions. Ketoacidosis can occur as a complication of type I diabetes mellitus (diabetic ketoacidosis), but can occur due to other disorders, such as chronic alcoholism and undernutrition. Ref Davidson 23rd edition pg 364', 'role': 'assistant'}]