Six charges each +3q are placed at the corners of a regular hexagon of each side 'a'. The electric field at the center of the hexagon is:

$\frac{\sqrt{3}}{4 x \varepsilon_0} \frac{q}{a^2}$ Zero $\frac{\sqrt{5}}{4 x \varepsilon_0} \frac{q}{a^2}$ $\frac{3 q}{4 x \varepsilon_0 a^2}$

Zero

The correct answer is Option (2) → Zero