The mass of a planet that has a moon whose time period and orbital radius are T and R respectively can be written as

• A

  $4{\mathrm{\pi }}^2{\mathrm{R}}^3{\mathrm{G}}^{-1}{\mathrm{T}}^{-2}$

• B

  $8{\mathrm{\pi }}^2{\mathrm{R}}^3{\mathrm{G}}^{-1}{\mathrm{T}}^{-2}$

• C

  $12{\mathrm{\pi }}^2{\mathrm{R}}^3{\mathrm{G}}^{-1}{\mathrm{T}}^{-2}$

• D

  $16{\mathrm{\pi }}^2{\mathrm{R}}^3{\mathrm{G}}^{-1}{\mathrm{T}}^{-2}$