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 Ayres T piece, B. Mapleson A or Magill's circuit, C. Mapleson C or Waters to and frocanister, D. Bains circuit", 'role': 'user'}, {'content': "Answer: A \nExplanation: The Ayre's T-piece with Jakson-Rees modification remains the mainstay of pediatric anaesthesia.", 'role': 'assistant'}]