Which among the following is categorized as conductor?

The correct answer is Option (2) → Graphite

By the size of their conductivity, materials are grouped as conductors (metals and graphite), semiconductors (such as Si and Ge) and insulators (such as glass and Teflon).

In graphite, each carbon atom is sp² hybridised and bonded to three other carbon atoms in flat hexagonal layers. The fourth electron of each carbon is not held in a σ bond; it is delocalised over the whole layer and can move freely. So graphite conducts electricity along its layers, although it is a non-metal.

So the substance categorised as a conductor is graphite.

NCERT (2026-27 edition):
Conductance of Electrolytic Solutions – …