The $IUPAC$ name of neopentane is :-

What is the correct $IUPAC$ name of the following radical?
$-CH_2-CH(OH)-CH_3$

Provide the $IUPAC$ name and identify the functional group for each of the following compounds:
$(i)$ $CH_3SO_3H$
$(ii)$ $CH_3CH_2CH_2NO_2$
$(iii)$ $CH_3CH_2CH_2CH_2CONH_2$
$(iv)$ $CH_3CH_2CH_2CH(NH_2)CH_3$

Write the $IUPAC$ names of the following compounds:
$a.$ $CH_3-CH=C(CH_3)_2$
$b.$ $CH_2=CH-C \equiv C-CH_3$
$c.$ $CH_2=CH-CH=CH_2$
$d.$ $C_6H_5-CH_2-CH_2-CH=CH_2$
$e.$ $2-\text{Methylphenol}$
$f.$ $CH_3-(CH_2)_4-CH(CH_2-CH(CH_3)_2)-(CH_2)_3-CH_3$
$g.$ $CH_3-CH=CH-CH_2-CH=CH-CH(C_2H_5)-CH_2-CH=CH_2$

$IUPAC$ name of the given structure 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?