Which of the following gives only one monosubstituted product upon further electrophilic substitution?

Identify the compound which is least reactive towards nucleophilic substitution reactions.

The compound used as an explosive is

Given below are two statements:
Statement $I$: Benzene is nitrated to give nitrobenzene,which on further treatment with $CH_{3}COCl / AlCl_{3}$ will give the product shown in the image.
Statement $II$: $NO_{2}$ group is a $m$-directing and deactivating group.
In the light of the above statements,choose the most appropriate answer:

The major product for the above reaction is:

What will be the product of the following reaction?
$1$-chloro-$2,4$-dinitrobenzene + $CH_3ONa \xrightarrow{\Delta} \text{Product}$