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': 'Blood gas analysis in type I respiratory failure shows - \nSelect and explain. \nA. ↑pCO2↓pO2, B. (N) pCO2 .↓pO2, C. ↓pCO2 .↓pO2, D. All are the false', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]