Condenser \[A\] has a capacity of \[15\mu F\] when it is filled with a medium of dielectric constant 15. Another condenser \[B\] has a capacity of \[1\mu F\]with air between the plates. Both are charged separately by a battery of\[100\ V\]. After charging, both are connected in parallel without the battery and the dielectric medium being removed. The common potential now is [MNR 1994]

• A.                    \[400V\]
• B.                                      \[800\ V\]                              
• C.                    \[1200\ V\]                    
• D.            \[1600\ V\]