: [જ્યાં $t-Bu$ એ$-C$ $-\left( CH _{3}\right)_{3}$ ]
image$\xrightarrow{{A{c_2}O}}A\mathop {\xrightarrow{{B{r_2}}}}\limits_{C{H_3}COOH} B\mathop {\xrightarrow{{{H_2}O}}}\limits_{{H^ + }} C$