In a medium of dielectric constant K, the electric field is $\overrightarrow {E}$, if $\in _0$ is permittivity of free space , the electric displacement vector is :

Question

$(A)\;\frac{K \overrightarrow{E}}{\in _0}\\ (B)\;K \in _0 \overrightarrow {E} \\ (C)\; \frac{\overrightarrow{E}}{K \in _0}\\ (D)\;None $