Fill in the blanks with appropriate words. Benzene has a planar structure. All carbon atoms in benzene are (I)____ hybridised. The ring structure of benzene was proposed by (II)________. It shows (III)_______substitution reactions. It reacts with (IV)_________in presence of aluminium chloride to form acetophenone.
A. `I-sp^(2)`,II-Kekule, III-electrolphilic, IV-acetyl chloride
B. `I-sp`, II-Dewar, III-Nucleophilic, IV-chloroethane
C. `I-sp^(2)`, II-Ladenberg, III-electrophilic, IV-chloroethane
D. `I-sp^(2)`, II-Baeyer, III-nucleophilic, IV-methyl bromide
