An electric charge ${10}^{-3} \mathrm{\mu C}$ is placed at the origin (0, 0) of X -Y co-ordinate system. Two points A and B are situated at $(\sqrt{2}, \sqrt{2} )$ and (2, 0) respectively. The potential difference between the points A and B will be :

• A

  9 V

• B

  Zero

• C

  2 V

• D

  4.5 V