Which of the following molecule exists?

${\mathrm{TII}}_3$ exist in ${\mathrm{Tl}}^{+}$ and ${\mathrm{I}}_3^{-}$ from But ${\mathrm{BiI}}_5$ and ${\mathrm{PbI}}_4$ does not exist due to strong oxidizing and strong reducing nature of cation and anion respectively.