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': 'Bronchial asthma patient on artificial ventilation requires \nSelect and explain. \nA. A low respiratory flow, B. An equal IE ratio of 1:1, C. An inverse ratio ventilation, D. An IE ratio 1:2.5', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]