JUPEBChemistryOrganic Chemistry: Hydrocarbons

Benzene undergoes substitution rather than addition reactions with bromine because

Abromine is not reactive enough to add to benzene.
Bit is a saturated compound.
Cit contains no double bonds.
Dthe delocalised pi electron system is stable and would be destroyed by addition.CORRECT
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The six pi electrons are delocalised over the ring, giving benzene extra stability. Addition would break this delocalisation, so benzene prefers electrophilic substitution, which keeps the ring intact. Benzene is unsaturated in formula (C$_6$H$_6$) but does not have ordinary localised double bonds.
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