This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breathing Systems, Subject name: Anaesthesia
Spontaneous breathing circuit used in children is - 
Select and explain. 
A. 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
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 of Ayre's T piece o Repeat from previous sessions