(A): Gas with lower molecular weight will effuse or diffuse faster than the gas with higher molecular weight.

(R): Kinetic energy of any gas is independent of temperature.

From Graham’s law 

Rate of diffusion is inversely proportional to square root of the molecular weight. Thus, lower mass gases diffuse or effuse at a faster rate.

The average Kinetic energy of a gas molecule 

$$\begin{gathered} {\mathrm{E}}_{\mathrm{K}}=\frac{3}{2}\frac{\mathrm{RT}}{\mathrm{N}}=\frac{3}{2}\mathrm{K}.\mathrm{T}. \\ \mathrm{where} \mathrm{K}=\frac{\mathrm{R}}{\mathrm{N}}=\mathrm{Boltzmann} \mathrm{constant} \end{gathered}$$

So, K.E of a gas depends on temperature.