Two bar-magnets having their moment of i...

Two bar-magnets having their moment of inertia in the ratio `2: 3` oscillate in a horizontal plane with time periods `(5)/(2)` s and `(9)/(2)` s respectively . The ratio of their magnetic moments is

`27 : 8`

`54: 25`

`25: 7`

`32 : 9`

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