Calculate the M.I. of a thin uniform ring about an axis tangent to the ring and in a plane of the ring, if its M.I. about an axis passing through the centre and perpendicular to plane is `4kg m^(2)`.

Options

A. `12kg m^(2)`
B. `3 kg m^(2)`
C. `6 kg m^(2)`
D. `9 kg m^2`

Answer

C