$(1)$ What is the IUPAC name for this compound?

$-($a$)1-$chloro$-2-$methyl$-4$ nitro

$($b$)4-$caloro $-3-$methye oxy aniline

$($c$)2-$chloro $-5-$ nitrotoluene.

$($d$)4-$chloro$-3-$methy$|$pheny $1)$ nitrate

$(2)$ The following pair of compound can be best descivibedasn

$($a$)$ diasteriomers

$($b$)$ enantiomers

$($c$)$ identical

$($d$)$ constitutional $($structural isomers$)$

$(3)$ which compound gives $4$ signals $($not counting coupling$)$ in its $1H-$NNR& spectrum?

uarr

A

B

c

$($a$)A$

$($b$)B$ and $C$

$($c$)C,B$ and $C$