Medium
$A$ solid sphere $A$ and a hollow sphere $B$ have the same mass and the same external radius. If their moments of inertia about their diameters are $I_A$ and $I_B$ respectively,then which of the following is true?
- A$I_A = I_B$
- B$I_A > I_B$
- C$I_A < I_B$
- D$\frac{I_A}{I_B} = \frac{d_A}{d_B}$
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