JEE Advanced 2015 · Paper 1, Chemistry question 25

Among the triatomic molecules/ions, $\ce{BeCl2}$, $\ce{N3-}$, $\ce{N2O}$, $\ce{NO2+}$, $\ce{O3}$, $\ce{SCl2}$, $\ce{ICl2-}$, $\ce{I3-}$ and $\ce{XeF2}$, 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: S = 16, Cl = 17, I = 53 and Xe = 54]