Softening of hard water is done using sodium aluminium silicate (zeolite) . This causes

Options

A. adsorption of `Ca^(2+)` and `Mg^(2+)` ions of hard water replacing `Na^(+)` ions.
B. adsorption of `Ca^(2+)` and `Mg^(2+)` ions of hard water replacing `Al^(3+)` ions.
C. both (a) and (b)`
D. none of the above

Answer

A