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 `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)HeltH_2ltCO_2ltO_2,(II) CH_4gtH_2gtO_2`
B. `(I)O_2ltHeltH_2ltCO_2 , (II) H_2gtO_2gtCH_4`
C. `(I)H_2ltHe ltO_2ltCO_2, (II) CH_4gtO_2gtH_2`
D. `(I)H_2ltO_2gtHR gtCO_2,(II)O_2 gtCH_4gtH_2`

Answer

C