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A ring-1 oscillate with period T1 about ...

A ring-1 oscillate with period `T_1` about tangential axis in the plane of ring and an another ring-2 oscillate with period `T_2` about tangential axis tangential axis perpendicular to plane of ring `T_1/T_2`?

A

`sqrt(3/4)`

B

`sqrt(5/8)`

C

`sqrt(8/5)`

D

`sqrt(4/3)`

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The correct Answer is:
A
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