Calcium acetate on heating yields

${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{MgBr} \underset{\left(\mathrm{ii}\right) {\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{\left(\mathrm{i}\right) {\mathrm{CO}}_2}{\to }} \mathrm{P}$

In the above equation, Product $\text{'}\mathrm{P}\text{'}$ is:

$\mathrm{Phenol} \stackrel{\mathrm{Zn} \mathrm{dust}}{\to } \mathrm{X} \underset{\mathrm{Anhyd}. {\mathrm{AlCl}}_3}{\overset{{\mathrm{CH}}_3\mathrm{Cl}}{\to }} \mathrm{Y} \stackrel{\mathrm{Alkaline} {\mathrm{KMnO}}_4}{\to } \mathrm{Z}$

The product ' $\mathrm{Z}$ ' is:.