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': 'All are true about diabetic ketoacidosis except? \nSelect and explain. \nA. Raging thirst, B. It is an early presentation in type 1 DM, C. Sodium Nitroprusside test is done to detect ketones, D. Serum bicarbonate > 15 mmol/L', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In diabetic ketoacidosis, the elevated blood sugar due to osmotic diuresis leads to polyuria. The stimulation of osmo-receptors will lead to increased thirst. DKA can lead to early presentation of type 1 DM but more frequently occurs in patients with pre-existing diabetes. Serum ketones are present in DKA and detectable at dilutions of 1:8. Urine dipstick using sodium nitroprusside can help in detection but plasma beta hydroxybutyrate is preferred. Serum bicarbonate levels in DKA are <10mmol/L', 'role': 'assistant'}]