Two particle of equal mass m and charge q are placed at a distance of 16 cm. They do not experience any force. The value of $\frac{\mathrm{q}}{\mathrm{m}}$ is 

• A

  1

• B

  $\sqrt{\frac{{\mathrm{\pi \epsilon }}_0}{\mathrm{G}}}$

• C

  $\sqrt{\frac{\mathrm{G}}{4{\mathrm{\pi \epsilon }}_0}}$

• D

  $\sqrt{4{\mathrm{\pi \epsilon }}_0\mathrm{G}}$