MCQ
Which of the following is aromatic ?
- A

- ✓

- C

- D







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Reason : Benzene is a solvent for the Friedel- Craft's alkylation of bromobenzene.

($A$) tetranuclear $\left[\mathrm{B}_4 \mathrm{O}_5(\mathrm{OH})_4\right]^{2-}$ unit
($B$) all boron atoms in the same plane
($C$) equal number of $s p^2$ and $s p^3$ hybridized boron atoms
($D$) one terminal hydroxide per boron atom