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': "The most appropriate circuit for ventilating a spontaneously breathing infant - \nSelect and explain. \nA. Jackson Rees modification of Ayre's T piece, 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: Ayre&;s T piece is used in infants. The patient inspires fresh gas from the reservoir tube,expires into the reservoir tube. Advantages are they are inexpensive,compact,no valves and low dead space', 'role': 'assistant'}]