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 patient put on ventilator shows a reading of ABG analysis as | PaCO2, Normal PaO2 and pH 7.5, what is the likely diagnosis? \nSelect and explain. \nA. Respiratory acidosis, B. Metabolic alkalosis, C. Metabolic acidosis, D. Respiratory alkalosis', 'role': 'user'}, {'content': "Answer: D \nExplanation: The ABG analysis reading in this patient clearly ours for respiratory alkalosis. In respiratory alkalosis: ? |PaCO2 ? | HCO3/PaCO2 ratio ? |pH ? the plasma K is often reduced and Cl increased Respiratory alkalosis is commonly seen in anesthetized or mechanically ventilated patient. Ref: Harrison's Internal Medicine, 18th Edition, Pages 363-372", 'role': 'assistant'}]