Which of the following is a non-benzenoid aromatic compound?

Aromatisation of $n$-heptane by passing over $(Al_2O_3 + Cr_2O_3)$ catalyst at $773 \ K$ gives:

What is the product formed when benzene reacts with isobutylene in the presence of sulfuric acid?

The species responsible for nitration and sulphonation by nitric acid/conc. $H_2SO_4$ and fuming $H_2SO_4$ are :

Which of the following is used as a catalyst in the manufacture of toluene from benzene with $CH_3Cl$?

For the electrophilic aromatic substitution reaction on the benzene ring,the substituents are $-CH_3$,$-CH_2Cl$,$-CHCl_2$,and $-CCl_3$. What is the increasing order of reactivity towards electrophilic substitution?