The masses of two uniform discs are in t...

The masses of two uniform discs are in the ratio `2 : 1` and their radii are in the ratio `1 : 2`. The ratio of their moments of inertia about the axis passing through their respective centres normal to plane is

`1 :1`

`2 : 1`

`1 : 2`

`1 : 4`

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