Which of the following ions does not involve ${\mathrm{sp}}^3$ hybridization?

${\mathrm{ICl}}_2^{-}$ involves ${\mathrm{sp}}^3\mathrm{d}$ hybrid orbitals of l atoms. The configuration of l along with le to form $1^{-}$ ion is 

Two single electrons form o bond with two chlorine atoms. There are three lone pairs of electrons.