Two capacitors $C_1$ and $C_2$ are charged to $120\;V$ and $200\; V$ respectively. It is found that by connecting them together the potential on each one can be made zero. Then :

Question

$\begin{array}{1 1} (1)\;5C_1=3C_2 \\ (2)\;3C_1=5C_2 \\ (3)\;3C_1+5C_2=0 \\ (4)\;9C_1=4C_2 \end {array}$