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The moment of inertia of a flat annular ...

The moment of inertia of a flat annular ring having mass M, inner radius a and outer radius b about the diametric axis through the centre is

A

A. `M/4(b^2 +a^2)`

B

B. `M/2(b^2 + a^2)`

C

C. `M/4(b -a)`

D

D. `M/4(b^2 -a^2)`

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