$A$ point charge $+q$ is placed at the centre of a cube of side $L$. The electric flux emerging from the cube is
- A$\frac{q}{\varepsilon_0}$
- BZero
- C$\frac{6 q L^2}{\varepsilon_0}$
- D$\frac{q}{6 L^2 \varepsilon_0}$
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