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Three solid spheres each of mass m and diameter d are stuck together such that the lines connecting the centres from an equilateral triangle of side length d. find the ratio `I_(0) //I_(A)`, where `I_(0)` is the moment of inertia of the system about an axis passing through the centroid and `I_(A)` is the moment of inertia of the syste about an axis passing through the centre of any sphere and perpendicular to the plane of the triangle.

A

`13/23`

B

`23/13`

C

`13/15`

D

`15/13`

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