# A molecule that cannot be superimposed on its mirror image is said to exhibit which of the following?

$\begin{array}{1 1}(a)\;\text{geometrical isomerism}\\(b)\;\text{optical isomerism}\\(c)\;\text{linkage isomerism}\\(d)\;\text{reactive isomerism} \end{array}$

A molecule that cannot be superimposed on its mirror image is said to exhibit optical isomerism.
Hence (b) is the correct answer.