The set which does not have ambidentate ligand(s) is [JEE Main 2023, 11 Apr (Shift 1)]

\(\mathrm{C}_2 \mathrm{O}_4^{2-}\), ethylene diammine, \(\mathrm{H}_2 \mathrm{O}\)

\(\mathrm{EDTA}^{4-}, \mathrm{NCS}^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}\)

\(\mathrm{NO}_2^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{EDTA}^{4-}\)

\(\mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{NO}_2^{-}, \mathrm{NCS}^{-}\)