Two parallel plate capacitors X and Y, have the same area of plates and same separation between plates. X has air and Y with dielectric of constant 2 , between its plates. They are connected in series to a battery of 12 V. The ratio of electrostatic energy stored in X and Y is-

Options

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

Answer

C