Which of the gases among `O_(2),CO_(2) and SO_(2)` under similar condition diffuses slower than `NO_(2) `gas?

Two flask A and B of equal capacity contains CO_(2) and O_(2) gas under similar conditions their ratio of atoms is :-

Four one litre flasks are separately filled with the gases, O_(2),F_(2),CH_(4) and CO_(2) under the same conditions. The ratio of number of molecules its these gases:

The ratio of rates of diffusion of SO_(2) , O_(2) and CH_(4) is

Which of the following pair of gases will have same rate of diffusion under similar conditions?

In a gaseous mixture which of NO_2, CO_2 and N_2O gases have same rate of diffusion