A charge q is located at the centre of a cube. The electric flux through any face is :

• A

  $\frac{\mathrm{\pi q}}{6\left(4{\mathrm{\pi \epsilon }}_0\right)}$

• B

  $\frac{\mathrm{q}}{6\left(4{\mathrm{\pi \epsilon }}_0\right)}$

• C

  $\frac{2\mathrm{\pi q}}{6\left(4{\mathrm{\pi \epsilon }}_0\right)}$

• D

  $\frac{4\mathrm{\pi q}}{6\left(4{\mathrm{\pi \epsilon }}_0\right)}$