For real gases van der Waals equation is written as `(P + (an^2)/(V^2))(V-nb )=nRT` where a and b are van der Waals constants two sets of gases are
`(I) O_2 ,CO_2 ,H_2 and He`
` (II ) CH_4 ,O_2 and H_2`
The gases given in set - I in increasing order of b and gases given in set - II in decreasing order of a, are arranged below. Select the correct order from the following

Options

A. `(I) He lt H_2 lt CO_2 lt O_2 (II) CH_4 gt H_2 gt O_2`
B. `(I ) O_2 lt He lt H_2 lt CO_2 (II) H_2 gt O_2 gt CH_4`
C. `(I) He lt H_2 lt O_2 lt CO_2 (II) CH_4 gt O_2 gt H_2 `
D. `(I) H_2 lt O_2 lt He lt CO_2 (II) O_2 gt CH_4 gt H_2 `

Answer

C