Which of the following reactions is known as Balz-Schiemann reaction?

Options

A. `C_(6)H_(5)N_(2)^(+)Cl^(-) +HBF_(4) to C_(6)H_(5)N_(2)^(+)BF_(4)^(-) overset(Delta)toC_(6)H_(5)F`
B. `C_(6)H_(5)-NH_(2)underset(Delta)overset(CHCl_(3)+3KOH)toC_(6)H_(5)-N^(+)-=C^(-)`
C. `C_(6)H_(5)-N_(2)^(+)Cl^(-) underset(HX)overset("Cu-powder")toC_(6)H_(5)-X+N_(2)+CuCl`
D. `C_(6)H_(5)CONH_(2) underset(Delta)overset(Br_(2)+4NaOH)toC_(6)H_(5)-NH_(2)+Na_(2)CO_(3)+2NaBr+2H_(2)O`

Answer

A

Explanation

Introduction of F-group in the presence of `HBF_(4),` is called Balz-Schiemann reaction.