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
The most appropriate circuit for ventilating a spontaneously breathing infant during anaesthesia is: 
Select and explain. 
A. 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
A: Jackson Rees' modification of Ayre's T Piece
Answer: A: Jackson Rees' modification of Ayre's T Piece 
Explanation: The most appropriate circuit advocated for use in infants is the Ayre's T piece (Mapleson E). Ref: Lee's Synopsis of Anaesthesia, 12th Edition, Page 117; Sho Textbook of Anaesthesia By Ajay Yadav, 2nd Edition, Page 27