Consider the following reaction
Phenol `overset(Zn)underset("dust")rarr X overset(CH_(3)Cl)underset(underset(AlCl_(3))("Anhydrous"))rarr Y overset("Alkaline")underset(KMnO_(4))rarrZ`
The product Z is
A. benzaldehyde
B. benzoic acid
C. benzene
D. toluene .