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
High Anion gap is seen in - 
Select and explain. 
A. Renal failure, B. Lactic acidosis, C. Diarrhoea, D. Alcoholics
B: Lactic acidosis
Answer: B: Lactic acidosis 
Explanation: Renal failure : Non anion gap metabolic acidosis. Diarrhea : Non anion gap metabolic acidosis. Alcoholics : metabolic alkalosis + metabolic acidosis Ref: Harrison&;s 19thE