A charge q is located at the centre of a cube. <br> The electric flux through any face is -

Question

( A ) $\frac{2 \pi q}{6 (4 \pi \varepsilon_0)}$
( B ) $\frac{4 \pi q}{6 (4 \pi \varepsilon_0)}$
( C ) $\frac {q}{6 (4 \pi \varepsilon_0)}$
( D ) $\frac{ \pi q}{6 (4 \pi \varepsilon_0)}$