The potential difference between points \[A\] and \[B\] of adjoining figure is [CPMT 1991]

• A.                    \[\frac{2}{3}V\]
• B.                                                        \[\frac{8}{9}V\]
• C.                                                                                                                                                                                                \[\frac{4}{3}V\]             
• D.                                                \[2\,V\]