The common name of the compound shown in the image is $:-$

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:

The $IUPAC$ name of $OHC-CH_2-CH_2-CH(CH_2-CHO)-CH_2-CHO$ is:

The $IUPAC$ name of the compound $CH_3-CH(CH_3)-COCH_3$ is:

Write the $IUPAC$ names of the following compounds:
$(1)$ $CH_3-CH=C(CH_3)_2$
$(2)$ $CH_2=CH-C \equiv C-CH_3$

Identify the compound that does not correctly match with its common name.

$A$. $HCHO$	Formaldehyde
$B$. $C_6H_5NH_2$	Aniline
$C$. $CH_3CH(CH_3)CH_3$	$n-$Butane
$D$. $CH_3CH(OH)COOH$	Lactic acid