In the following series of chemical reactions, identify Z \[{{C}_{3}}{{H}_{7}}OH\underset{160-{{180}^{o}}C}{\mathop{\xrightarrow{Conc.{{H}_{2}}S{{O}_{4}}}}}\,X\underset{{}}{\mathop{\xrightarrow{B{{r}_{2}}}}}\,Y\underset{Alc.KOH}{\mathop{\xrightarrow{\text{Excess of}}}}\,Z\] [Manipal MEE 1995]

• A. \[\underset{\underset{\,\,\,\,\,\,\,\,\,\,\,\,N{{H}_{2}}\,\,\,\,N{{H}_{2}}}{\mathop{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}}}\,\]               
• B. \[\underset{\underset{\,\,\,\,\,\,\,\,\,\,OH\,\,\,\,\,OH}{\mathop{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}}}\,\]
• C.                 \[\underset{\underset{OH}{\mathop{|}}\,}{\mathop{C{{H}_{3}}-C=C{{H}_{2}}}}\,\]       
• D.                 \[C{{H}_{3}}C\equiv CH\]