Two condenser `C_1` and `C_2` are connected in parallel with a battery of constant potential difference and the energies stored in them are found to be in the ratio 1:2. If the same condenser were now connected in the series with same battery, the ratio of the potential differences across then will be

Options

A. `1:2`
B. `4:1`
C. `1:4`
D. `2:1`

Answer

D