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 during anaesthesia is? \nSelect and explain. \nA. jackson Rees modification of Ayre's T piece, B. Mapleson A or Magill's circuit, C. Mapleson C or Waters to and fro canister, D. Bains circuit", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Jackson Rees modification", 'role': 'assistant'}]