$A$ planet of mass $M$ has a satellite of mass $m$,revolving around the planet in a circular orbit of radius $r$ and time period $T$. The mass $(M)$ of the planet is

• A
  $\frac{4\pi^2 r^3}{G T^2}$
• B
  $\frac{4\pi^2 r^2}{G T^3}$
• C
  $\frac{G T^2}{4\pi r^3}$
• D
  $\frac{r^3 G}{4\pi T^2}$