This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ABG Analysis Simplified, Subject name: Medicine
[{'content': "A 28 year old woman was admitted electively to a HDU following C- section. A diagnosis of 'fatty liver of pregnancy' had been made preoperatively. She was commenced on a continuous morphine infusion at 5 mg/hr and received oxygen by mask. This was continued overnight and she was noted to be quite drowsy the next day. Aerial blood gases were- pH 7.16, pCO2- 61.9 mmHg, pO2- 115 mmHg and HCO3- 21.2 mmol/l? \nSelect and explain. \nA. Respiratory acidosis +Metabolic acidosis, B. Respiratory alkalosis + Metabolic alkalosis, C. Respiratory acidosis + Metabolic alkalosis, D. Respiratory alkalosis + Metabolic acidosis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Acidotic pH, Elevated CO2 , Low HCO3 Respiratory acidosis + Metabolic acidosis', 'role': 'assistant'}]