Observe the following isomers and identify appropriate phrase(s) for the blank.

                 

Select the correct statements about the given compound $\mathrm{P} ({\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{O}-\mathrm{CH}={\mathrm{CH}}_2) \& \mathrm{Q} ({\mathrm{CH}}_3-\mathrm{O}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}={\mathrm{CH}}_2)$.

Which will show geometrical isomerism $?$