This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diabetes Mellitus, Subject name: Medicine
[{'content': 'Plasma anion gap is increased in? \nSelect and explain. \nA. Diabetic Ketoacidosis, B. A 2, C. Fistula, D. Uretero-sigmoid ostomy', 'role': 'user'}, {'content': "Answer: A \nExplanation: Option B, C, D- N Anion gap acidosis causes : ' DR. FUSE (mnemonic) Diarrhea A 1,2,4 Fistula Ureterosigmoidostomy | Anion gap acidosis causes : 'KULT' (mnemonic) Ketoacidosis Uremia (acute kidney injury, acute tubular Necrosis) Lactic acidosis Toxins", 'role': 'assistant'}]