Nitration of which among the following compounds yields cyclonite?

$4-$Nitrotoluene ($para-$nitrotoluene) on reduction with $Fe / HCl$ and then electrophilic bromination with an excess amount of $Br_2$ gives

In amines,the hybridisation state of $N$ is

The correct order of basicity is........

Assertion $(A)$: $-NH_2$ group of aniline is ortho,para directing in electrophilic substitutions.
Reason $(R)$: $-NH_2$ group stabilises the arenium ion formed by the ortho,para attack of the electrophile.
The correct answer is

Which among the following is a correct order of $pK_b$ values of amines in the aqueous phase?