Given van der)Waals constant for $$NH_{3}, H_{2},O_{2} and CO_{2}$$ respectively 4.17, 0.244, 1.36 and 3.59, which ‘one»of the following gases is most easily liquefied, ?

A

$$CO_{2}$$

B

$$O_{2}$$

C

$$H_{2}$$

D

$$NH_{3}$$