What is the magnitude of a point charge which produces an electric field of 2 N/C at a distance of 60 cm $\left(1/4{\mathrm{\pi \epsilon }}_0=9\times {10}^9\mathrm{N}-{\mathrm{m}}^2/{\mathrm{C}}^2\right)$

• A

  $8\times {10}^{-11}\mathrm{C}$

• B

  $2\times {10}^{-12}\mathrm{C}$

• C

  $3\times {10}^{-11}\mathrm{C}$

• D

  $6\times {10}^{-10}\mathrm{C}$