This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory, Subject name: Medicine
[{'content': 'Type II Respiratory failure is characterised by (Davidson) \nSelect and explain. \nA. Low PaO2 /Low PaCO2, B. Normal PaCO2 / Low PaO2, C. Low PaO2 /High PaCO2, D. High PaO2 / Low PaCO2', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (Low PaO2/High PaCO2) (1684 -H17th)Respiratory failure - PaO2 <8.0 kPa (60mmHg) and PaCO2 > 6.5 kPa (50 mmHg)Type 1 - PaO2 low, PaCO2 normal or lowType II - PaCO2 raised, PaO2 low - Ventilatory failure* Most important - cause in chronic type II respiratory failure is - chronic bronchitis', 'role': 'assistant'}]