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 40 years old male develops excessive hyperven-tilation. A G reveals pH- 7.5 pCO2 24 mm Hg PO2 88 mm of Hg. True statement is - \nSelect and explain. \nA. Respiratory alkalosis, B. Metabolic alkalosis, C. Respiratory acidosis, D. Metabolic acidosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: First step\n\nDetermine whether it is acidosis or alkalosis\nIncreased pH indicates alkalosis\n\nSecond step\n\nInspect HCO3-/CO2 to determine the cause of alkalosis or acidosis.\n\npCO2 → 24 mm\xa0Hg (decreased)\n\nThe alteration in CO2 is in sync. with the alteration in the pH, so the alkalosis can be attributed to a decrease in pCO2.\nThus, it is a case of respiratory alkalosis.', 'role': 'assistant'}]