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From a ring of mass M and radius R, a 30...

From a ring of mass M and radius R, a `30^o` sector is removed. The moment of inertia of the remaining portion of the ring, about an axis passing through the centre and perpendicular to the plane of the ring is

A

`frac{3}{4}MR^2`

B

`frac{5}{6}MR^2`

C

`MR^2`

D

`frac{11}{12}MR^2`

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