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X and Y are large, parallel conducting plates close to each other. Each face has an area A. X is given a charge Q. Y is without any charge. Point A, B and C are as shown in the figure. Find the incorrect option.

                        

1.  the field at B is Q2ε0A

2.  the field at B is Qε0A

3.  the fields at A, B and C are of the same magnitude

4.  the fields at A and C are of the same magnitude, but in opposite directions