Determine the number of aromatic species among the given compounds:

Total number of aromatic compounds from the following is:

Which of the following compounds does not undergo the Friedel-Crafts reaction?

$o, p-$ directing groups are mostly

Match the following reactions given in Column-$I$ with their respective names in Column-$II$:

Column-$I$	Column-$II$
$(i)$ $\text{Benzene} + \text{Conc. } HNO_3 + \text{Conc. } H_2SO_4 \rightarrow \text{Nitrobenzene}$	$(A)$ $\text{Halogenation}$
$(ii)$ $\text{Benzene} + Cl_2 \xrightarrow{\text{Anhy. } AlCl_3} \text{Chlorobenzene}$	$(B)$ $\text{Nitration}$
$(iii)$ $\text{Benzene} + CH_3Cl \xrightarrow{\text{Anhy. } AlCl_3} \text{Toluene}$	$(C)$ $\text{Friedel-Crafts acylation}$
$(iv)$ $\text{Benzene} + CH_3COCl \xrightarrow{\text{Anhy. } AlCl_3} \text{Acetophenone}$	$(D)$ $\text{Friedel-Crafts alkylation}$

Give the decreasing order of reactivity for the $ESR$ (Electrophilic Substitution Reaction) for the following compounds:
$(1)$ Benzene
$(2)$ Toluene
$(3)$ Chlorobenzene
$(4)$ Nitrobenzene