This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthetic equipments, Subject name: Anaesthesia
[{'content': 'In magil circuit airflow is - \nSelect and explain. \nA. 1/2 of minute volume, B. equal to M.V., C. 2 X M.V., D. 3 X M.V.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In Magills it fresh gas flow is equal to minute volume. In Bains co-axial system or type D ,fresh air flow required to prevent rebreathing is 1.6minute volume', 'role': 'assistant'}]