A charge Q is fixed at a distance d in front of an infinite metal plate. The lines of force are represented by




As we learned,
Field lines are always normal to conducting surface - - wherein

Metal plate acts as an equipotential surface, therefore the field lines should act normal to the surface of the metal plate.field. But electric field is a conservative field. Hence a field represented by these lines cannot be an electric field.
Option 1)

Option 2)

Option 3)

Option 4)

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