A $\;Q \;\mu C\;$ is placed at the centre of a cube. The flux coming from any surface will be

Question

$(a)\;\large\frac{Q}{6 \in_{0}}\times10^{-6}\qquad(b)\;\large\frac{Q}{6\in_{0}}\times10^{-3} \qquad(c)\;\large\frac{Q}{24 \in_{0}}\qquad(d)\;\large\frac{Q}{8 \in_{0}}$