Answer:
The correct answer is aromatic hydrocarbons.
Step-by-step explanation:
Aromatic compounds are named on the basis of their fragrant characteristics and are unsaturated hydrocarbon ring compositions, which demonstrate unique characteristics, comprising unusual stability because of their aromaticity.
They are usually signified as resonance compositions comprising double and single bonds. However, the bonding is more robust in comparison to a conjugated structure, and it is more precisely signified as delocalized electron density shared among all the atoms in the ring.