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: Anaesthesia
[{'content': 'True about anaesthesia machine – a) Cylinder is a part of high pressure systemb) O2 flush delivers < 35 litc) O2 flush delivers > 35 litd) Pipeline is a part of low pressure system \nSelect and explain. \nA. a, B. bc, C. ad, D. ac', 'role': 'user'}, {'content': 'Answer: D \nExplanation: There are two sources of gases (O2, N2O & air) for anaesthetic machine :-\n\n\nCylinder\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0 → High pressure system\nPipeline source → Intermediate pressure system\n\n\nOxygen flush delivers 35-75 liters of oxygen per minute.', 'role': 'assistant'}]