<prompt> Use the following laboratory values find the best option to describe acid-base disorder: Plasma pH 7.12 Plasma Pco2 60 mm Hg Plasma 19 mEqLRespiratory acidosis with renal compensationMetabolic alkalosis with respiratory compensationCombined metabolic and respiratory acidosisCombined metabolic and respiratory alkalosis  <response>: pH 7.4, thus acidosis Pco2 40 mm Hg, thus respiratory acidosis HCO3- 24 mEqL, thus metabolic acidosis 