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In a flask, the weight ratio of CH4 (g) ...

In a flask, the weight ratio of `CH_4 (g)` and`SO_2(g)` at 298 K and 1 bar is `1 : 2`. The ratio of the number of molecules of `SO_2(g)` and `CH_4(g)` is _______.

A

`1 : 4`

B

`4 : 1`

C

`1 : 2`

D

`2 : 1`

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