The Earth is assumed to be a sphere of radius $R$ and mass $M$ having a period of rotation $T$. The angular momentum of the Earth about its axis of rotation is
- A$\frac{2 \pi MR^2}{5 T}$
- B$\frac{4 \pi MR^2}{5 T}$
- C$\frac{MR^2 T}{2 \pi}$
- D$\frac{MR^2 T}{4 \pi}$
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