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Four rings each of mass M and radius R a...

Four rings each of mass M and radius R are arranged as shown in the figure. The moment of inertia of the system about YY' will be

A

`7/2 MR^2`

B

`5/2 Mr^2`

C

`9/2 Mr^2`

D

` 2/5 MR^2`

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The correct Answer is:
A
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