<prompt> True about Heliox a Helium is an inert gasb Less viscous than airc Higher density than aird Reduces work of breathinge Mixture of He O2acdadeabdad  <response>: Heliox is a mixture of helium 80 and oxygen 20. Heliox has a similar viscosity to air but a lower breathing and lowers airway resistance.Helium is an inert gas. 