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The radii of two planets 'A and 'B 'are ...

The radii of two planets 'A` and 'B 'are 'R' and '4R' and their densities are `rho` and `rho`/3 respectivelyThe ratio of acceleration due to gravity at their surfaces (`g_A: g_B`) will be:

A

`3:16`

B

`3:4`

C

`1:16`

D

`4:3`

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