In the given conversion best yield will obtained with:

Options

A. `A = CH_(3) - overset(O)overset(||)(C) - Cl, AlCl_(3), B = Zn (Hg), HCl`
B. `A = Zn (Hg), HCl, B = CH_(3) - overset(O)overset(||)(C) - Cl, AlCl_(3)`
C. `A = CH_(3) - CH_(2) - Cl, AlCl_(3), B = Zn (Hg), HCl`
D. `A = NH_(2) - NH_(2)//HO^(-), D, B = CH_(3) - CH_(2) - Cl, AlCl_(3)`

Answer

B

Explanation

Clemmensen followed by Friedel-Craft reaction