question: Q:A 27-year-old man presents to the emergency department with his family because of abdominal pain, excessive urination, and drowsiness since the day before. He has had type 1 diabetes mellitus for 2 years. He ran out of insulin 2 days ago. The vital signs at admission include: temperature 36.8°C (98.2°F), blood pressure 102/69 mm Hg, and pulse 121/min. On physical examination, he is lethargic and his breathing is rapid and deep. There is a mild generalized abdominal tenderness without rebound tenderness or guarding. His serum glucose is 480 mg/dL. Arterial blood gas of this patient will most likely show which of the following?? 
  {'A': '↑ pH, ↑ bicarbonate, and normal pCO2', 'B': '↑ pH, normal bicarbonate and ↓ pCO2', 'C': '↓ pH, normal bicarbonate and ↑ pCO2', 'D': '↓ pH, ↓ bicarbonate and ↑ anion gap', 'E': '↓ pH, ↓ bicarbonate and normal anion gap'},