<prompt> Bains circuit is Mapelson type___ circuit.Type AType BType DType E  <response>: Ans. c Type D. Ref. Short textbook Anaesthesia 2n ed., 27Breathing circuitsA. Open system Out dated, B. Semiopen Out dated, C. Semiclosed Mapleson circuits, and D. Closed.MAPLESON ANAESTHESIA CIRCUITS 1. Mapleson type A Magills or Lack circuit is the circuit of choice for spontaneous ventilation2. Mapleson type B, C are equally efficient for controlled and spontaneous ventilation but no more used3. Mapleson type D Bains circuit is the circuit of choice for controlled ventilation4. Mapleson type E is paediatric circuit5. Mapleson type F circuit is Jackson and Rees modification of Ayres T piece and used in patients with age 6years or weight20kg CIRCUITFRESH GAS FLOW Spontaneous ventilationControlled ventilation1.Type AEqual to minute volume2xminute volume2.Type D2.5xminute volume1.6xminute volume3.Type E and F3xminute volume2xminute volume 