The correct option is B Gas
The rate of diffusion of liquids is
higher than that of solids. This is due to the fact that in the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state.
Similarly,
The rate of diffusion of gas is
higher than that of liquid and solids. This is due to the fact that in the gaseous state, particles move freely and have greater space between each other as compared to particles in the liquid and solid state.