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?

 

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

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

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

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