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A thin wire of mass m and length l is be...

A thin wire of mass m and length l is bent in the form of a ring . Moment of inertia of that ring about an axis passing througfh its centre and perpendicular to its plane is

A

`ml^2` / `4pi`

B

`ml^2` / `2pi`

C

`ml^2` / `4pi^2`

D

`ml^2` / `2pi^2`

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