An electric charge $$10^{-3} \mu C$$ 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 volt

B

zero

C

2 volt

D

4.5 volt