The $IUPAC$ name of $CH_3-CH(CH_2-CH_3)-CHO$ is

Provide the $IUPAC$ name for the compound: $CH_3-C(Cl)=C(CH_3)-CH(C_2H_5)-CH_2-C \equiv CH$.

Identify the correct $IUPAC$ name for the given compound:
$CH_3-CH_2-C(CH_3)(N(CH_3)_2)-CH_2-CH_3$

The $IUPAC$ name of $(CH_3)_3C-CH=CH_2$ is

What is the $IUPAC$ name of the compound $CH_3CH=CHCH=CHCOOH$?

Given below are two statements:
Statement $I$: $IUPAC$ name of $HO-CH_2-(CH_2)_3-CH_2-COCH_3$ is $7-$hydroxyheptan$-2-$one.
Statement $II$: $2-$oxoheptan$-7-$ol is the correct $IUPAC$ name for above compound.
In the light of the above statements,choose the most appropriate answer from the options given below: