Three very large plates are given charges as shown in the figure. If the cross-sectional area of each plate is the same, then the final charge distribution on the surface of the plates a, b, c, d, e, f is

All of above are equal

Using the conservation of charge principle, distribute the charge on all the surfaces of the plates a, b, c, d, e, and f. Then use the concept, electric field is zero inside the plates.