What is the $IUPAC$ name of the following compound?

Given below are two statements:
Statement $I$: $IUPAC$ name of Compound $A$ is $4-$chloro-$1, 3-$dinitrobenzene.
Statement $II$: $IUPAC$ name of Compound $B$ is $4-$ethyl-$2-$methylaniline.
In the light of the above statements,choose the most appropriate answer from the options given below:

Write the prefix and suffix for the following functional groups:
$(i)$ $-COCl$
$(ii)$ $-CONH_2$
$(iii)$ $-COOR$
$(iv)$ $-CHO$
$(v)$ $-COOH$
$(vi)$ $-COX$
$(vii)$ $-CO-$
$(viii)$ $-C \equiv N$
$(ix)$ $-COO^-$

What is the $IUPAC$ name of the following compound?

$IUPAC$ name of $CH_3-CH=CH-COOH$ is:

What is the $IUPAC$ name of the given compound?