The correct increasing order of van der ...

The correct increasing order of van der Waals constant 'a' for the following gases is

A

`CH_4lt H_2lt CO_2lt NH_3`

B

`CH_4 lt H_2lt NH_3lt CO_2`

C

`H_2 lt CH_4 lt CO_2 lt NH_3`

D

`H_2 lt CH_4lt NH_3 lt CO_2`

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