Identify product '$$\mathrm{B}$$' in following reaction.

$$\mathrm{CH}_3 \mathrm{Br}+\mathrm{AgNO}_2 \longrightarrow \mathrm{A} \xrightarrow{\mathrm{Sn} / \mathrm{HCl}} \mathrm{B}$$

The major product obtained in the following reaction is Chlorobenzene + chlorine $$\xrightarrow[\mathrm{FeCl}_3]{\text { Anhydrous }}$$ product (Major)

The major product obtained in the following reaction is

When tert-butyl bromide is heated with silver fluoride, the major product obtained is