This question has Statement-$1$ and Statement-$2$. Of the four choices given after the Statements,choose the one that best describes the two Statements.
Statement-$1$: No work is required to be done to move a test charge between any two points on an equipotential surface.
Statement-$2$: Electric lines of force at the equipotential surfaces are mutually perpendicular to each other.

• A
  Statement-$1$ is true,Statement-$2$ is true,Statement-$2$ is the correct explanation of Statement-$1$.
• B
  Statement-$1$ is true,Statement-$2$ is true,Statement-$2$ is not the correct explanation of Statement-$1$.
• C
  Statement-$1$ is true,Statement-$2$ is false.
• D
  Statement-$1$ is false,Statement-$2$ is true.