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': 'The blood gas parameters: pH 7.58, pCO2 23 mm pO2 300 mm Hg and oxygen saturation 60% are most consistent with - \nSelect and explain. \nA. Carbon monoxide poisoning, B. Ventilatory malfunction, C. Voluntary hyperventilation, D. Methyl alcohol poisoning', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]