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A uniform solid sphere of radius R has a...

A uniform solid sphere of radius R has a cavity of radius 1m cut from it if centre of mass of the system lies at the periphery of the cavity then

A

`(R^2 + R + 1) (2–R) = 1`

B

`(R^2 – R – 1) (2–R) = 1`

C

`(R^2 – R + 1) (2–R) = 1`

D

`(R^2 + R – 1) (2–R) = 1`

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