$IUPAC$ name of the following compound $(P)$ is:

Which of the following is the correct priority order for the selection of the principal functional group for the nomenclature of a polyfunctional compound according to the $IUPAC$ system?

The correct $IUPAC$ name of the given compound is

Which of the following represents the correct $IUPAC$ name for the compounds concerned?
$(a)$ $2,2-$ Dimethylpentane or $2-$ Dimethylpentane
$(b)$ $2,4,7-$ Trimethyloctane or $2,5,7-$ Trimethyloctane
$(c)$ $2-$ Chloro$-4-$methylpentane or $4-$ Chloro$-2-$methylpentane
$(d)$ But$-3-$yn$-1-$ol or But$-4-$ol$-1-$yne

What is the $IUPAC$ name of the given compound? $CH_2=CH-O-CHO$

Select the correct match of $IUPAC$ name with structure.