The chelating ligand used to remove excess of copper and iron in chelate therapy is

Step-by-step solution

Excess of copper and iron are removed by the chelating ligands D-pencilliamine and desferrioxime B via the formation of coordination compounds. D-Penicillamine is used to chelate and remove copper and is a useful treatment for patients with Wilson's disease. Deferoxamine and deferasirox are chelating agents that help remove excess iron from the body. Calcium ethylenediamine tetraacetic acid (CaNaEDTA) is given as an injection to treat severe lead poisoning.