Which of the following is optically active
$\begin{array}{*{20}{c}}
{C{H_3} - CH - C{H_2}} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl\,\,}
\end{array}$
$\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{Cl} \\
|
\end{array}} \\
{C{H_3} - C - C{H_3}} \\
| \\
{Cl}
\end{array}$
$\begin{array}{*{20}{c}}
{{H_2}C - C{H_2} - C{H_2}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,} \\
{\,\,Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl}
\end{array}$
Which of the following is expected to be optically active
Which one of the following contains asymmetric carbon atom
Which of the following compounds is chiral?
Which of the following statements best describes the stereochemical relationships of compound $I, II$ and $III$ shown below ?
Which dimethylcyclobutane is optically active ?