${{C}_{6}}{{H}_{5}}\overset{+}{\mathop{C}}\,{{H}_{2}}>C{{H}_{2}}=CH\overset{+}{\mathop{C}}\,{{H}_{2}}>{{\left( C{{H}_{3}} \right)}_{2}}\overset{+}{\mathop{C}}\,H>C{{H}_{3}}\overset{+}{\mathop{C}}\,{{H}_{2}}$
$\mathrm{C}_{7} \mathrm{H}_{8} \stackrel{3 \mathrm{Cl}_{2} / \Delta}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Br}_{2} / \mathrm{Fe}}{\rightarrow} \mathrm{B} \stackrel{\mathrm{Zn} / \mathrm{HCl}}{\rightarrow} \mathrm{C}$
નીપજ '$C$' શોધો.
નીપજ $(A)$ શું હશે ?