$A$ group which deactivates the benzene ring towards electrophilic substitution but which directs the incoming group principally to the $o-$ and $p-$ positions is

Which of the following is least reactive towards $S_NAr$?

What is the increasing order of nucleophilic substitution reaction for the following compounds?
$(I)$ $C_6H_5-CH_3$
$(II)$ $C_6H_6$
$(III)$ $C_6H_5-COOH$

Which of the following reactions is a $Wurtz-Fittig$ reaction?

Which among the following statements is true about the reactivity of haloarenes towards nucleophilic substitution reactions?
$1$. Haloarenes are very reactive towards nucleophilic substitution reaction.
$2$. In haloarenes,the $C-X$ bond acquires partial double bond character.
$3$. The $C-X$ bond in haloarenes is longer than the $C-X$ bond in haloalkanes.
$4$. In haloarenes,the phenyl cation formed as a result of self-ionisation is stable.

Which of the following reactions is called the Wurtz-Fittig reaction?