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
Anaesthesia breathing circuit recommended for spontaneous breathing is 
Select and explain. 
A. Mapleson A, B. Mapleson B, C. Mapleson C, D. Mapleson D
A: Mapleson A
Answer: A: Mapleson A 
Explanation: TypeA or Magills circuit is used in Spontaneous ventilation. Type D is used in controlled ventilation. TypeB and Type C are obselete nowadays