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': "The most appropriate circuit for ventilating a spontaneously breathing infant – \nSelect and explain. \nA. Jackson Rees modification of Ayre's T peiece, B. Mapleson A or Magill's circuit, C. Mapleson C or water's to & fro canister, D. Bain's circuit", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]