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: Ans. is 'a' i.e., Jackson Rees modification