Which of the following will be the most stable diazonium salt ($R{N_2}^{+}{X}^{-}$)?

• Diazonium salts are a cluster of organic compounds having a common functional group which are known to be ionic in nature and are mostly water soluble. The general representation of diazonium salts are $\mathrm{R}-\mathrm{N}{{\mathrm{H}}_2}^{+}{\mathrm{X}}^{-}$, where R represents an organic compound.
• The benzene diazonium salt, ${\mathrm{C}}_6{\mathrm{H}}_5{{\mathrm{N}}_2}^{+}{\mathrm{X}}^{-}$is stabilized by the resonance. The dispersal of the positive charge in the entire benzene ring during resonance increases its stability and hence is most stable.

Therefore, option (B) is correct.