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(D) Step $1$: Dehydration of propan$-1-$ol with concentrated $H_2SO_4$ at $160-180\,^{\circ}C$ yields propene $(X = CH_3CH=CH_2)$.Step $2$: Addition o

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$CH_3-C \equiv CH$

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(D) Step $1$: Dehydration of propan$-1-$ol with concentrated $H_2SO_4$ at $160-180\,^{\circ}C$ yields propene $(X = CH_3CH=CH_2)$.Step $2$: Addition of $Br_2$ to propene yields $1,2$-dibromopropane $(Y = CH_3CH(Br)CH_2Br)$.Step $3$: Dehydrohalogenation of $1,2$-dibromopropane with excess alcoholic $KOH$ yields propyne $(Z = CH_3-C \equiv CH)$.

In the following series of chemical reactions,identify $Z$.
$C_3H_7OH$ $\xrightarrow[160-180\,^{\circ}C]{Conc. H_2SO_4} X$ $\xrightarrow{Br_2} Y$ $\xrightarrow{Excess \ of \ Alc. KOH} Z$

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In the following series of chemical reactions,identify $Z$.$C_3H_7OH$ $\xrightarrow[160-180\,^{\circ}C]{Conc. H_2SO_4} X$ $\xrightarrow{Br_2} Y$ $\xrightarrow{Excess \ of \ Alc. KOH} Z$