MCQ
The best sequence of reactions to prepare $2$ -heptanone is
- A$propyne \xrightarrow{NaN{{H}_{2}}}X\xrightarrow{n-\,{{C}_{4}}{{H}_{2}}Br}Y\xrightarrow[{{H}_{2}}S{{O}_{4}}]{{{H}_{2}}O,H{{g}^{2+}}}$
- ✓$ethyne \xrightarrow{NaN{{H}_{2}}}X\xrightarrow{n-\,{{C}_{5}}{{H}_{12}}Br}Y\xrightarrow[{{H}_{2}}S{{O}_{4}}]{{{H}_{2}}O,H{{g}^{2+}}}$
- C$1 - hexyne \xrightarrow{NaN{{H}_{2}}}X\xrightarrow{\,C{{H}_{2}}Br}Y\xrightarrow[{{H}_{2}}S{{O}_{4}}]{{{H}_{2}}O,H{{g}^{2+}}}$
- D$1- pentyne \xrightarrow{NaN{{H}_{2}}}X\xrightarrow{\,{{C}_{2}}{{H}_{5}}Br}Y\xrightarrow[{{H}_{2}}S{{O}_{4}}]{{{H}_{2}}O,H{{g}^{2+}}}$