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': 'A female patient after injury comes to casualty. Her ABG shows low pH. PCO2 high, bicarbonate normal.The diagnosis is - \nSelect and explain. \nA. Respiratory alkalosis, B. Respiratory acidosis, C. Metabolic acidosis, D. Metabolic alkalosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: First step\n\nDetermine whether academia or alkalemia is present\npH is low, indicating acidosis\n\nSecond step\n\nInspect HCO3-/CO2 to determine the cause of alkalemia or academia.\nIn this case, the pCO2 is high and the bicarbonate is normal, so the acidosis can be easily attributed to increased CO2\nThus, this is a case of respiratory acidosis', 'role': 'assistant'}]