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': 'ABG analysis of a patient on ventilator, shows decreased pCO2, normal pO2, pH 7.5, diagnosis is - \nSelect and explain. \nA. Resp. acidosis, B. Metabolic alkalosis, C. Resp. alkalosis, D. Metabolic acidosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: First step\n\nDetermine whether academia or alkalemia is present by observing the pH.\npH is increased, indicating alkalosis\n\nSecond step\n\nInspect HCO3- /CO2 to determine the cause of academia or alkalemia\npCO2 is decreased indicating respiratory alkalosis.', 'role': 'assistant'}]