The structure of the product(Z) in the reactions given below \[HC\equiv CH\underset{{{H}^{+}}}{\mathop{\xrightarrow{NaN{{H}_{2}},C{{H}_{3}}COC{{H}_{3}}}}}\,X\underset{{{H}_{2}}O}{\mathop{\xrightarrow{H{{g}^{2+}},{{H}_{3}}{{O}^{+}}}}}\,Z\] is [Roorkee 2000]

• A. \[\begin{array}{*{35}{l}}    C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}OH  \\ \end{array}\]
• B. \[C{{H}_{3}}-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{C{{H}_{3}}}{\mathop{\overset{\,\,\,|\,\,\,\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}OH\]
• C. \[C{{H}_{3}}-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,\,}{\mathop{\underset{OH}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{C\,-\,}}\,}}\,}}\,}}\,C{{H}_{3}}\]
• D. \[C{{H}_{3}}-CHOH-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,}{\mathop{CH}}\,-}}\,CHO\]