Among the triatomic molecules/ions, $\text{BeC}{\text{l}}_2,{\mathrm{N}}_3^{-},{\mathrm{N}}_2\mathrm{O},\mathrm{N}{\mathrm{O}}_2^{+},{\mathrm{O}}_3,\mathrm{S}\mathrm{C}{\mathrm{I}}_2,\mathrm{I}\mathrm{C}{\mathrm{I}}_2^{-},{\mathrm{I}}_3^{-}$ and $\text{Xe}{\text{F}}_2$ , the total number of linear molecule(s)/ion(s) where the hybridization of the central atom does not have contribution from the d-orbital(s) is

[Atomic number : $\mathrm{S}=16,\mathrm{ }\mathrm{C}\mathrm{l}=17,\mathrm{ }\mathrm{I}=\mathrm{ }53\mathrm{ }\mathrm{a}\mathrm{n}\mathrm{d}\mathrm{ }\mathrm{X}\mathrm{e}=54$ ]