The mean free path of molecules in an ideal gas A is half that of another ideal gas B. The diameter of the spherical molecules of gas A is twice the…

The mean free path of molecules in an ideal gas A is half that of another ideal gas B. The diameter of the spherical molecules of gas A is twice the diameter of the molecules of B . If number densities of the gases A and B are $\displaystyle n_{\mathrm{A}}$ and $\displaystyle n_{\mathrm{B}}$, respectively, then the correct option is :