Statement-I : Attack of electrophile to the benzene results in the formation of a non aromatic arenium ion.
Statement-II : In arenium ion, five carbons are ${\mathrm{sp}}^2$ hybridised, one carbon is ${\mathrm{sp}}^3$ hybridisied and delocalization of electrons stops at ${\mathrm{sp}}^3$ hybridised carbon.

 In electrophilic substitution reactions of benzene electrophile forms sigma bond with benzene ring generating positively charged arenium ion containing one ${\mathrm{sp}}^3$ hybridised carbon atom, and according to huckel rule arenium is no longer aromatic it becomes non aromatic, so statement 1 is correct. In arenium ion there is one ${\mathrm{sp}}^3$ hybridised carbon atom remaining five are ${\mathrm{sp}}^2$ hybridised.