<prompt> Which of the following is main determinant of carbon dioxide elimination is Mapelson circuit:Type of circuitFresh gas flowType of ventilationsAge of patient  <response>: Any mapelson circuit can be used for any type of ventilation just by varying fresh gas flow. Required fresh gas flow Spontaneous controlled Mapelson A - Equal to minute ventilation very high Mapelson D - 2-3 x minute ventilationMV 1-2 x MV 