AIIMS 2019 Chemistry Hybridization and Geometry MCQ Question

The complex ion $[Ag(S₂O₃)₂]^{3-}$ features silver (Ag) coordinated to two thiosulfate ligands (S₂O₃²⁻), resulting in a coordination number of 2. This arrangement leads to sp hybridization, which allows for linear geometry, as the two ligands are positioned 180° apart. Option A is incorrect because sp hybridization corresponds to a coordination number of 2, not sp², which is associated with a coordination number of 3 and trigonal planar geometry. Options C and D are also incorrect; sp³ hybridization corresponds to a tetrahedral geometry (coordination number 4), while dsp² hybridization is relevant for square planar complexes (coordination number 4 or 6).