In the following arrangement shown in Fig. 12.2, the bulb will not glow if the ends A and B are connected with
Fig.12.2
(a) A steel spoon
(b) A metal clip
(c) A plastic clip
(d) A copper wire
Plastic clip is a poor conductor of electricity, it is an insulator. The bulb will not glow if the ends A and B are connected with A plastic clip.
Hence option (C) is correct.