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A solid sphere of mass M and radius R ha...

A solid sphere of mass M and radius R has a spherical cavity of radius R/2 such that the centre of cavity is at a distance R/2 from the centre of the sphere. A point mass `m` is placed inside the cavity at a distance R/4 from the centre of sphere. The gravitational force on mass `m` is

A

`11GMm//R^2`

B

`14GMm//R^2`

C

`GMm//2R^2`

D

`GMm//R^2`

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