Q 1.26: Which among the curves shown in Figure cannot possibly represent electrostatic field lines?
(a) Wrong, because field lines must be normal to a conductor.
(b) Wrong, because field lines can only start from a positive charge. It cannot start from a negative charge,
(c) Right;
(d) Wrong, because field lines cannot intersect each other,
(e) Wrong, because electrostatic field lines cannot form closed loops.