Mass of moon is 7.34 x ${10}^{22}$ kg. If the acceleration due to gravity on the moon is 1.4 $\mathrm{m}/{\mathrm{s}}^2$, the radius of the moon is (G = $6.667\times {10}^{-11} {\mathrm{Nm}}^2/{\mathrm{kg}}^2$)

• A

  $0.56\times {10}^4\mathrm{m}$

• B

  $1.87\times {10}^6\mathrm{m}$

• C

  $1.92\times {10}^6 \mathrm{m}$

• D

  $1.01\times {10}^8 \mathrm{m}$