Two non-reactive monoatomic ideal gases ...

Two non-reactive monoatomic ideal gases have their atomic masses in the ratio `(2 : 3)`. The ratio of their partial pressure, when enclosed in a vessel kept at a constant temperature, is `(4 : 3)`. The ratio of their densities is :

A

`1:4`

B

`1:2`

C

`6:9`

D

`8:9`

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