A capacitor of capacitance $C_0$ is charge to potential $V_0$ and then isolated . A small capacitor C is charged from $C_0$, discharge and then charged again; this process is repeated n times. Due to this potential of $C_0$ decreases to r. Value of C is :

Question

$(A)\;C_0 \bigg( \frac{V_0}{V} \bigg)^{1/n}\\ (B)\;C_0 \bigg[\bigg(\frac{V}{V_0}\bigg )^n +1\bigg] \\ (C)\; C_0 \bigg[\bigg(\frac{V_0}{v}\bigg)^{1/n}-1 \bigg] \\ (D)\;C_0 \bigg[\bigg(\frac{V}{V_0}\bigg)-1 \bigg]^n$