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
True about Bain circuit – a) Mapleson type Bb) Mapleson type Dc) Can be used for spontaneous respirationd) Can be used for controlled vantilatione) Coaxial 
Select and explain. 
A. bce, B. abd, C. bcde, D. acde
C: bcde
Answer: C: bcde 
Explanation: Bain circuit (type D Mapleson) is a co-axial system.
It is the circuit of choice for controlled ventilation.
It can also be used for spontaneous ventilation.