This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
Which of the following statements about Diabetic Ketoacidosis is true - 
Select and explain. 
A. Decreased Bicarbonate, B. Increased Lactate, C. Normal anion gap, D. Glucose < 250 mg\/dl
A: Decreased Bicarbonate
Answer: A: Decreased Bicarbonate 
Explanation: The cardinal biochemical features of diabetic ketoacidosis are- * hyperglycemia (blood glucose >= 11 mmol/L ~200 mg/dL) * hyperketonemia (>= 3mmol/ L) and ketonuria (more than 2+ on standard urine sticks) * metabolic acidosis - increased anion gap (venous bicarbonate <15 mmol/L and / or venous pH < 7.3) Reference : page 812 Davidson's Principles and practice of Medicine 22nd edition