Ratio of moments of inertia of bodies of equal mass but different density or size

1. A.
   $\left(\frac{\rho_B}{\rho_A}\right)^{2/3}$
2. B.
   $\left(\frac{\rho_A}{\rho_B}\right)^{2/3}$
3. C.
   $\frac{\rho_A}{\rho_B}$
4. D.
   $\frac{\rho_B}{\rho_A}$

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1. A.
   $d_1:d_2$
2. B.
   $d_2:d_1$
3. C.
   $1:d_1d_2$
4. D.
   $1:d_1^2d_2$

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1. A.
   $3:1$
2. B.
   $1:9$
3. C.
   $1:81$
4. D.
   $1:27$

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