(a) Figure (a) cannot represent electrostatic field lines since electrostatic field lines start or end only at 90° to the surface of the conductor.
(b) Figure (b) too cannot represent electrostatic field lines as electrostatic field lines do not start from a negative charge.Electric field lines always traverse from a region of positive charge to a region of negative charge.
(c) Electrostatic field lines are represented by figure (c).
(d) Figure (d) cannot represent electrostatic field lines since no two such lines of force can intersect each other.
(e) As electrostatic field lines cannot form closed loop, therefore figure (d) also does not represent electrostatic field lines.
