This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory Failure, Subject name: Medicine
[{'content': 'pH = 7.30, pCO2 = 38, HCO3 = 18 signifies: \nSelect and explain. \nA. Metabolic acidosis with compensatory respiratory alkalosis, B. Respiratory acidosis with compensatory metabolic alkalosis, C. Respiratory alkalosis with compensatory metabolic acidosis, D. Metabolic acidosis with respiratory acidosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: * Since pH is less, and HCO3 is less it implies metabolic acidosis. * Now for compensation pCO2= HCO3+15 = 18 + 15 = 33. * The value predicted is not matching with given pCO2 of 38 mm Hg. * It implies compensation is not there and it is a Mixed disorder * Conclusion metabolic acidosis with respiratory acidosis', 'role': 'assistant'}]