<prompt> True about Bain circuit a Mapleson type Bb Mapleson type Dc Can be used for spontaneous respirationd Can be used for controlled vantilatione Coaxialbceabdbcdeacde  <response>: 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. 