GKFix MCQ Question

How much work is done in bringing the second charge (-q) to point B when +q is already at A?

• A. +\frac{q^2}{4\pi\epsilon_0 d}
• B. -\frac{q^2}{4\pi\epsilon_0 d}
• C. Zero
• D. \frac{q^2}{4\pi\epsilon_0 d\sqrt{2}}