A capacitor of capacity \[{{C}_{1}}\]is charged to the potential of \[{{V}_{o}}\]. On disconnecting with the battery, it is connected with a capacitor of capacity \[{{C}_{2}}\] as shown in the adjoining figure. The ratio of energies before and after the connection of switch \[S\] will be

• A.            \[({{C}_{1}}+{{C}_{2}})/{{C}_{1}}\]
• B.                    \[{{C}_{1}}/({{C}_{1}}+{{C}_{2}})\]
• C.                    \[{{C}_{1}}{{C}_{2}}\]
• D.                    \[{{C}_{1}}/{{C}_{2}}\]