A parallel plate capacitor is made of two circular plates separated by a distance of 5mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is `3xx10^(4) V/m`, the charge density of the positive plate will be close to
A. `6xx10^(4) C/m^2`
B. `6xx10^(-7)C/m^2`
C. `3xx10^(-7)C/m^2`
D. `3xx10^(4)C/m^2`
