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': "Spontaneously breathing infant- which breathing circuit to be used? \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 & fro canister, D. Bain's circuit", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Jackson Rees modification of Ayre's T piece * Circuit of choice for spontaneous ventilation in adult - Mapleson A (Magill circuit)* Circuit of choice for controlled ventilation in adult - Mapleson D (Bain circuit)* Circuit of choice for children - Type F, i.e. Jackson-Rees (first choice) and type E, i.e. Ayre's T piece (second choice)* Co-axial system- Mapelson C (Water's to & fro)", 'role': 'assistant'}]