The $IUPAC$ name of $CH_3-CH=CH-C\equiv CH$ is

Which of the following is correctly matched?
Common name $\to$ $IUPAC$ name

The $IUPAC$ name of the given compound is:

Which of the following compounds has an incorrect $IUPAC$ name?

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

The $IUPAC$ name of $CH_3-CH(C_6H_5)-CH_2-OH$ is