Identify the ‘A’ in the above reaction,

Since the reaction involves the formation of carbocation in acidic medium, they is also a chance that the chloride ion may attack the carbocation and form the said product as shown below. The above reaction is Clemmensen reduction. In this  carbonyl group is converted to -CH2- .along with Clemmenson reaction, substitution of -OH with -Cl takes place, since the reaction mixture has chloride ion nucleophile.