<prompt> A COPD patient was having pedal oedema for which thiazides were prescribed. Since he was complaining of excessive sleepiness an ABG sample was taken. Repo is pH 7.42, pCO2 67 mmHg and HCO3 42mEq with Na 140 mEq, K 3.0, CL- 88 mEq. What is the diagnosis?Metabolic alkalosis with respiratory acidosisMetabolic alkalosis with compensatory respiratory alkalosisMetabolic alkalosis with metabolic acidosisHigh anion gap metabolic acidosis with paradoxical aciduria  <response>: pCO2 - 67 mmHg N 40 mmHg Every 10 mm pCO2 HCO3- 1 meq 27mm pCO2 HCO3- 2.7 meq CO2 retention : Respiratory acidosis Thiazides leads to dehydration which GFR - aldosterone- hypokalemic alkalosis. 