The diagrams below show regions of equipotential. 
        
A positive charge is moved from \(A\) to \(B\) in each diagram. Choose the correct statement from the options given below:
| 1. | in all four cases, the work done is the same. | 
| 2. | minimum work is required to move \(q\) in figure \(\mathrm{(a)}.\) | 
| 3. | maximum work is required to move \(q\) in figure \(\mathrm{(b)}.\) | 
| 4. | maximum work is required to move \(q\) in figure \(\mathrm{(c)}.\) |