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Two identical rings each of mass m with ...

Two identical rings each of mass `m` with their planes mutually perpendicular, radius `R` are welded at their point of contact `O`. If the system is free to rotate about an axis passing through the point `P` perpendicular to the plane of the paper, then the moment of in inertia of the system about this axis is equal to

A

`6.5mR^(2)`

B

`12mR^(2)`

C

`6mR^(2)`

D

`11.5mR^(2)`

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The correct Answer is:
A
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