Z' in the following sequence of reaction is `C_6 H_6 overset(HNO_3 // H_2 SO_4) underset(Delta) to W overset(Zn//HCl) to X overset(NaNO_2) underset(HCl, 0-5^@C) to Y overset(H_2 O//H_3 PO_2) to Z`

Z' in the following sequence of reactions is C_(6)H_(6)overset(HNO_(3)//H_(2)SO_(4))underset(Delta)rarr W overset(Zn//HCl)rarr X overset(NaNO_(2))underset(HCl)rarr Y overset(H_(2)O//H_(3)PO_(2))rarr Z

The product B of the following sequence of reactions is C_(6)H_(5)CONH_(2) overset(Br_(2))underset(NaOH)toA overset(NaNO_(2)//HCl)underset(ul(" "0-5^(@)C" "))toB

Consider the following sequence of reaction. C_6H_5NH_2 underset(HCl)overset(NaNO_2)to X overset(Cu_2(CN)_2) to Y overset(H_2O // H^+)to Z Z is identified as