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': "In an infant anaesthesia is given by using – \nSelect and explain. \nA. Open mask ventilation, B. Non – breathing circuit, C. Magill's system, D. Ayre's T. Piece", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]