Mass density of a solid sphere is $\rho $ . Radius of the sphere is $R$. The gravitational field at a distance $r$ from the centre of the sphere inside it is

  • A

    $\frac{{4\rho G\pi r}}{3}$

  • B

    $\frac{{4\rho G{r^2}}}{3}$

  • C

    $\frac{{4\rho G{R^3}}}{{3{r^2}}}$

  • D

    $\frac{{\rho G{R^3}}}{{\pi r}}$

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