Let $E_1$, $E_2$, $E_3$ and $E_4$ be the magnitudes of the electric field between the pairs of plates, I, II, III and IV respectively. Then: (A) $E_1 > E_2 > E_3 > E_4$ (B) $E_3 > E_4 > E_1 > E_2$ (C) $E_4 > E_3 > E_2 > E_1$ (D) $E_2 > E_3 > E_4 > E_1$