The force of attraction between the plates of parallel plate capacitor having area A and charge Q is given by

Question

$(A)\;\frac{Q^2}{2A \in _0} \\ (B)\;\frac{Q^2}{4A \in _0} \\ (C)\;\frac{Q^2}{A \in _0} \\ (D)\;\frac{Q}{A \in _0}$