Aqueous solution of KI dissolves ${\text{I}}_2$ to form $K{I}_3$which of the following statements is/are correct 

The solution is violet is colour

The solution untains  ${\text{K}}^{\text{f}}{\text{\hspace{0.17em}and\hspace{0.17em}I}}_3^{-}$

The solution contains ${\text{K}}^{\text{3+}}{\text{\hspace{0.17em}and\hspace{0.17em}I}}^{\text{-}}$as Lewis base

In${\text{KI}}_3,I_2$behaves as Lewis acid and $I^{-}$as Lewis base