The set which does not have ambidentate ligand(s) is

Ligand which has two different donor atoms and either of the two donor atom is attached to the metal during complex formation is called ambidentate ligand. Among the given ligands ${\mathrm{NCS}}^{-}\left({\mathrm{SCN}}^{-}\right) \mathrm{and} {\mathrm{NO}}_2^{-}\left({\mathrm{ONO}}^{-}\right)$ are  ambidentate ligands

${\mathrm{C}}_2{\mathrm{O}}_4^{2-} \left(\mathrm{bidentate}\right)$,ethylenediamine(bidentate) and ${\mathrm{H}}_2\mathrm{O}$(monodentate) ligands are not ambidentate.