The correct statement for the molecule CsI _ 3 , is :

Options

1. AIt is a covalent molecule.
2. BIt contains ${\text{Cs}}^{+}$ and ${\text{I}}_{3}^{-}$ ions.
3. CIt contains ${\text{Cs}}^{3 +}$ and ${\text{I}}^{-}$ ions.
4. DIt contains ${\text{Cs}}^{+} {, I}^{-}$ and lattice ${\text{I}}_{2}$ molecule.