A capacitor of capacitance C1 is charged to potential V and battery is disconnected.Now the capacitor is connected to a uncharged capacitor of capacitance C2 then what will be common potential of the combination
(A) C1V / C1 + C2
(B) C2V / C1 + C2
(C) (C1 + C2) / C1 + C2
(D) C2 / C1 + C2