Which of the following graphs correctly shows how the electrostatic potential $V$ varies with distance $r$ from a point charge?
- A$A$ graph showing $V$ is directly proportional to $r$.
- B$A$ graph showing $V$ is inversely proportional to $r$.
- C$A$ graph showing $V$ is inversely proportional to $r^2$.
- D$A$ graph showing $V$ is constant with respect to $r$.
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