Solid sphere: moment of inertia or radius of gyration about a tangent compared with a diameter

1. A.
   $1$
2. B.
   $3$
3. C.
   $5$
4. D.
   $7$

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1. A.
   $\left(\dfrac{7}{5}\right)^{1/2}$
2. B.
   $\left(\dfrac{7}{2}\right)^{1/2}$
3. C.
   $\left(\dfrac{2}{7}\right)^{1/2}$
4. D.
   $\left(\dfrac{2}{5}\right)^{1/2}$

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