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: Answer is C (Respiratory and metabolic acidosis) The acid base disorder is therefore both respiratory and metabolic acidosis. There is acidosis (pH < 7.35). Raised PCO2 (acidosis) indicates that change in CO2 is in keeping with change in pH. The respiratory component is therefore primary. Decreased HCO3 (acidosis) indicates that change in HCO3 is also primary. The acid base disorder is therefore both respiratory and metabolic acidosis.', 'role': 'assistant'}]