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
An obese lady aged 45 years, was brought to emergency in a semi comatose condition. The laboratory investigations showed K+ (5.8 mmol/L); Na+ (136 mmol/L); blood pH (7.1), HC03 (12 mmol/L),' ketone bodies (350 mg/dl). The expected level of blood glucose for this lady is: 
Select and explain. 
A. < 45 mg/dl., B. <120 mg/dl., C. >180 mg/dl., D. <75 mg/dl.
C: >180 mg/dl.
Answer: C: >180 mg/dl. 
Explanation: Ans. is 'c' i.e. > 180 mg /dL Metabolic acidosis (pH 7.1 and HCO3' 12 mmol/1) presence of ketone bodies and increased potassium (Normal 3.5 mmol/1 to 5 mmol/L) favours the diagnoses of diabetic ketoacidosis.Diabetic ketoacidosis occurs when the serum glucose level is around 300-600 mg/dlNote: For every 100mg elevation of glucose in serum the Na+ concentration decreases by 3 meq.