Ligands with two or more points of attachment to metal atom are called chelating ligand.
And here, Gly is attached with 2 points... DMG is attached with two points...EDTA is attached with 6 points...from metal...
So, here all of these is correct...

$$Hope it's help... $$

< b="" />Introduction: < />
A chelating ligand is a type of ligand that has more than one atom capable of binding to a central metal ion. These ligands form complex structures with the metal ion by forming multiple bonds. Chelating ligands are widely used in many fields, including medicine, biology, and industry.

< b="" />Options: < />
A) DMG (Dimethylglyoxime)
B) Gly (Glycine)
C) EDTA (Ethylenediaminetetraacetic acid)
D) All these

< b="" />Explanation: < />

< b="" />DMG (Dimethylglyoxime): < />
DMG is a chelating ligand. It is a bidentate ligand, meaning it has two atoms capable of binding to a central metal ion. DMG forms stable complexes with metal ions, such as nickel and copper. These complexes are often used in analytical chemistry for metal ion detection.

< b="" />Gly (Glycine): < />
Glycine is not a chelating ligand. It is a monodentate ligand, meaning it has only one atom capable of binding to a central metal ion. Glycine forms complexes with metal ions, but it does not form multiple bonds.

< b="" />EDTA (Ethylenediaminetetraacetic acid): < />
EDTA is a chelating ligand. It is a hexadentate ligand, meaning it has six atoms capable of binding to a central metal ion. EDTA forms very stable complexes with metal ions, especially with transition metals. These complexes are often used in various applications, such as metal ion chelation therapy and water treatment.

< b="" />Conclusion: < />
From the given options, the chelating ligands are DMG and EDTA. DMG is a bidentate ligand, while EDTA is a hexadentate ligand. Glycine is not a chelating ligand as it is a monodentate ligand. Therefore, the correct answer is D) All these.