A nurse is caring for a client with diabetic ketoacidosis. Which arterial blood gas result is most consistent with this condition?

pH 7.48, PaCO2 40 mmHg, HCO3- 24 mEq/L

pH 7.30, PaCO2 30 mmHg, HCO3- 18 mEq/L

pH 7.50, PaCO2 45 mmHg, HCO3- 30 mEq/L

pH 7.35, PaCO2 38 mmHg, HCO3- 22 mEq/L