Two point charges $$Q$$ each are placed at a distance $$d$$ apart. A third point charge $$q$$ is placed at a distance $$x$$ from mid-point on the perpendicular bisector. The value of $$x$$ at which charge $$q$$ will experience the maximum Coulomb's force is:

A

$$d$$

B

$$\frac{d}{2}$$

C

$$\frac{d}{\sqrt{2}}$$

D

$$\frac{d}{2\sqrt{2}}$$