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Three particles each of mass 'm' are kep...

Three particles each of mass 'm' are kept at the three vertices of an equilateral triangle of side 'a'. Moment of inertia of the system about an axis passing through the centroid and perpendicular to its plane is

A

`3 ma^2`

B

`ma^2`

C

`ma^2//3`

D

`2//ma^2`

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