Which is not a true statement concerning Graham's law?

Which is not a true statement concerning Graham’s law?1. At a given temperature the average kinetic energies of molecules of different gases are equal.2. The rates of effusion of gases are proportional to the square roots of their molecular densities.3. Effusion refers to the escape of a gas through a tiny hole.4. At a given temperature the average velocity of CH4 molecules is about twice that of SO2 molecules.5. The rates of effusion of gases are inversely proportional to the square roots of their molecular weights.