Which of the following Mapleson systems has no rebreathing bag?: (A) B, (B) C, (C) D, (D) E
Answer is D. Mapleson E/Ayre's T piece doesn't have a Rebreathing bag. If we add a Rebreathing bag it forms Mapleson F which is a circuit of choice for Paediatric patients both for Spontaneous and Controlled ventilation.