$A$ point charge $q$ is held at the centre of a circle of radius $r$. $B$ and $C$ are two points on the circumference of the circle,and $A$ is a point outside the circle. If $W_{AB}$ represents the work done by the electric field in taking a charge $q_0$ from $A$ to $B$,and $W_{AC}$ represents the work done from $A$ to $C$,then:

• A
  $W_{AB} > W_{AC}$
• B
  $W_{AB} < W_{AC}$
• C
  $W_{AB} = W_{AC} \neq 0$
• D
  $W_{AB} = W_{AC} = 0$