Three charged particles A,B and C with charges – 4q, 2q and -2q are present on the circumference of a circle of radius d. The charged particles A,C and centre O of the circle formed an equilateral triangle as shown in figure, Electric field at O along x-direction is:

• A

  $\frac{2\sqrt{3}q}{\pi {\epsilon }_0{d}^2}$

• B

  $\frac{\sqrt{3}q}{\pi {\epsilon }_0{d}^2}$

• C

  $\frac{3\sqrt{3}q}{4\pi {\epsilon }_0{d}^2}$

• D

  $\frac{\sqrt{3}q}{4\pi {\epsilon }_0{d}^2}$