Three point charges shown in the figure be along a straight line. The work done against electrostatic forces to exchange the position of the central +ve charge with one of the negative charge is

Options

• Option A

  $\frac{q^2}{4\pi\varepsilon_{\omicron}a}$

• Option B

  $\frac{q^2}{8\pi\varepsilon_{\omicron}a}$

• Option C

  $\frac{-q^2}{8\pi\varepsilon_{\omicron}a}$

• Option D

  $\frac{-q^2}{4\varepsilon_{\omicron}a}$