${\mathrm{Ag}}^{+}$ forms many complexes, some of these are ${\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+},{\left[\mathrm{Ag}{\left(\mathrm{CN}\right)}_2\right]}^{-} \mathrm{and} {\left[\mathrm{Ag}{\left({\mathrm{S}}_2{\mathrm{O}}_3\right)}_2\right]}^{3-}$. which of the following statement is true?

• A

  In these complexes, Ag⁺ is a Lewis base

• B

  The hybridisation of Ag⁺ is sp²

• C

  The Ag⁺ complexes are good reducing agents

• D

  These complexes are all linear