Figure shows some equipotential lines distributed in space. A charged object is moved from point A to point B. Which of the following statements is true?

 

• A

  The work done in Fig. (i) is the greatest.

• B

  The work done in Fig. (ii) is the least.

• C

  The work done is the same in Fig. (i), Fig. (ii) and Fig. (iii).

• D

  The work done in Fig. (iii) is greater than Fig. (ii) but equal to that in Fig. (i).