This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Aerial blood gas analysis of a patient reveals - pH 7.2, HCO3 36 mmol/L pCO2 70 mmHg. The abnormality is \nSelect and explain. \nA. Respiratory acidosis with metabolic alkalosis, B. Respiratory acidosis, C. Respiratory alkalosis with metabolic acidosis, D. Respiratory acidosis with metabolic acidosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Respiratory acidosis with metabolic alkalosisIn this patientpH - DecreasedHCO3 - IncreasedPCO2 - IncreasedPCO2 is increased which indicates respiratory acidosisHCO3- is increased which indicates metabolic alkalosisThus this is a case of mixed disorder, where respiratory acidosis and metabolic alkalosis exist together.', 'role': 'assistant'}]