Conversion of benzene diazonium chloride to chlorobenzene is an example of which of the following reactions?

Which of the following are intermediates in the Sandmeyer reaction?
$(i)$ $C_6H_5N^{+} \equiv NCl^{-}$
$(ii)$ $C_6H_5N^{+} \equiv N$
$(iii)$ $\overset{\centerdot }{C}_6H_5$
$(iv)$ $C_6H_5Cl$

The chlorobenzene is generally obtained from a corresponding diazonium salt by reacting it with

High yield of aryl halide is formed in

Describe the preparation of aryl halides from aromatic hydrocarbons and from amines via the Sandmeyer reaction.

Industrially,chlorobenzene is prepared by: