(Solved): Cis-trans: isomerism is possible only in the case of: \[ \begin{array}{l} \mathrm{BrCH}=\mathrm{CHB ...

Cis-trans: isomerism is possible only in the case of: \[ \begin{array}{l} \mathrm{BrCH}=\mathrm{CHBr} \\ \mathrm{Br}_{2} \mathrm{C}=\mathrm{CHBr} \\ \mathrm{Br}_{2} \mathrm{C}=\mathrm{CBr}_{2} \\ \mathrm{CH}_{2}=\mathrm{CHBr} \\ \mathrm{CH}_{2}=\mathrm{CBr}_{2} \end{array} \]