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': 'Feature of severe diarrhea \nSelect and explain. \nA. Metabolic acidosis, B. Metabolic alkalosis, C. High anion gap, D. Increased anion gap', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Diarrhea can cause Non anion gap acidosis. Ref: Harrison&;s 19thE', 'role': 'assistant'}]