Correct Answer - Option 4 : EDTA
Concept:
EDTA is used in the treatment of lead poisoning. Deferrioxine B is used in treatment of iron poisoning and D-penicillamine is used in treatment of heavy metal poisoning, while cis-platin is used for treating cancer.
Ethylene-diaminetetraacetic acid (EDTA) is a chemical used for both industrial and medical purposes.
It is an aminopolycarboxylic acid and a colourless, water-soluble solid. Its conjugate base is ethylene diamine tetraacetate. It is widely used to dissolve lime scale. Its usefulness arises because of its role as a hexadentate (“six-toothed”) ligand and chelating agent, i.e., its ability to sequester metal ions such as Ca2+ and Fe3+.
After being bound by EDTA into a metal complex, metal ions remain in solution but exhibit diminished reactivity. EDTA is produced as several salts, notably disodium EDTA and calcium disodium EDTA.
