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Four point masses, each of value m, are ...

Four point masses, each of value m, are placed at the corners of a square ABCD of side l. The moment of inertia of this system about an axis passing through A and parallel to BD is

A

`sqrt3ml^(2)`

B

`3ml^(2)`

C

`ml^(2)`

D

`2ml^(2)`

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The correct Answer is:
B
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