`Ph - CO_(2)H overset(SOCl_(2))rarr A overset(Me_(2)NH)rarrB overset((C)) rarr Ph - CHO`, unknown reagent (C) is:

A overset(Cl_(2))(rarr) B overset("AgCN")(rarr) C overset([H])(rarr) (CH_(3))_(2) NH Reactant [ A ] is :

2CH_(3)CHO overset(OH^(-))rarr X rarr Y overset(H_(2)-Pd//C)rarr Z, Z is

(A)overset(CI_(2)//\h2)rarr (B) overset(aq.KOH)rarr(C)overset([O])rarr CH_(3) CHO Identify A,B and C .

Complete the following reaction: underset((A))(o-HOOC) - C_(6) H_(4) - CH_(2) - Ph overset(SOCl_(2))rarr (B) underset(AlCl_(3))overset("Anhyd")(rarr) (C) underset(+HCl)overset(Zn + Hg)(rarr) (D) underset(600^(@)C)overset(S "or" Se)(rarr) (E)

Ph-NH_(2)underset(0^(@)C)overset(HNO_(2))rarr A underset(BF_(3))overset(HF)rarr B overset(Delta)rarr C , C is :