EDTA is used for the estimation of

Options

A. `Na^(+)` and `K^(+)` ions
B. `Cl^(-)` and `Br^(-)` ions
C. `Cu^(2+)` and `Ag^(+)` ions
D. `Ca^(2+)` and `Mg^(2+)` ions

Answer

4

Explanation

`Ca^(+2)` and `Mg^(+2)` form complexes with EDTA.