A patient with salicylic acid poisoning has the following aerial blood gas analysis repo : pH = 7.12 : pCO2 = 18mmHg; HCO3 = 12mmol/L. The resulting acid base abnormality can be best labeled as:
Metabolic acidosis with compensatory respiratory alkalosis Metabolic acidosis with compensatory respiratory alkalosis Respiratory acidosis with metabolic alkalosis Metabolic acidosis