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': 'An ABG analysis shows, pH 7.2, raised pCO2 decreased HCO3– diagnosis is - \nSelect and explain. \nA. Respiratory acidosis, B. Compensated metabolic acidosis, C. Respiratory and metabolic acidosis, D. Respiratory alkalosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Information provided in the question\npH → decreased (N → 7.4)\nPCO2 →\xa0Increased.\nHCO3- → Decreased\nFirst step\n\nDecreased pH indicates acidosis\n\nSecond step\n\nInspect the HCO3- /CO2 to determine the cause of acidosis.\nBoth the abnormalities are in sync with the change in pH.\nThis suggests that compensatory response has not occurred.\nThis suggests that there must be some other abnormality besides the primary abnormality, which does not allow the compensatory response.\nThis is a case of mixed acid-base disorder where both respiratory and metabolic acidosis coexists together.\nThis can also be confirmed by looking at the /CO2 ratio which moves in the opposite direction', 'role': 'assistant'}]