<prompt> Which of the following circuit is preferred in child for spontaneous respiration:Mapleson AJackson Rees circuitMapleson CMapleson E  <response>: Ans. A Mapleson APediatric Breathing Circuits:Type E Mapleson Circuit:It is Ayres T piece with corrugated tubing.It is a pediatric circuitAs it does not have breathing bag so it is not a complete circuit It was made complete by attaching a breathing bag by attaching a breathing bagby Jackson Rees.Type E is basically a circuit only for spontaneous respiration as it does not contain breathing bag but can be utilized for controlled ventilation by intermittently occluding the end of expiratory limb 