Identify X and Y in the following reaction sequence

$\mathrm{X}\stackrel{\mathrm{Zn}}{\to } \mathrm{Y}\underset{\mathrm{Zn} + {\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{O}}_3}{\to }}2-\mathrm{Propanone} + \mathrm{Farmaldehyde}$

Zinc metal is used to remove halogen atoms form the molecule, that is dehalogenation.

Dehalogenation from adjacent carbon atom produces double bond between the carbon

atoms. Upon reaction of double bonded molecule with ozone it undergo ozonolysis via

ozonide formation and produces carbonyl compounds. The reaction sequence is as

follows$1,2-\mathrm{dibromo}-2-\mathrm{methylpropane}\stackrel{\mathrm{Zn}}{\to }2-\mathrm{methylprop}-1-\mathrm{ene}\underset{\mathrm{Zn}/{\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{O}}_3}{\to }} 2-\mathrm{propanone} + \mathrm{Formaldehyde}$Hence correct option will be (C).