The major product of the following reaction sequence will be

$\underset{\left(1\right)}{\overset{\mathbf{PhCOCl}\mathbf{ }\mathbf{/}\mathbf{ }\mathbf{Pyridine}\mathbf{ }}{\to }} \underset{\left(2\right)}{\overset{\mathit{C}{\mathit{H}}_{\mathbf{3}}\mathit{C}\mathit{O}\mathit{C}\mathit{l}\mathit{ }\mathbf{/}\mathit{A}\mathit{l}\mathit{C}{\mathit{l}}_3}{\to }}$
$\underset{\left(3\right)}{\overset{\mathit{Z}\mathit{n}\mathbf{-}\mathit{H}\mathit{g}\mathit{ }\mathbf{/}\mathit{H}\mathit{C}\mathit{l}\mathbf{/}\mathbf{∆}}{\to }} \underset{\left(4\right)}{\overset{\mathit{B}{\mathit{r}}_{\mathbf{2}}\mathit{ }\mathbf{/}\mathit{F}e}{\to }}$

1.
2.
3.
4.