The correct order of decreasing ionic radii among the following isoelectronic species is

Options

A. `K^(+) gt Ca^(2+) gt Cl^(-) gt S^(2-)`
B. `Ca^(2+) gt K^(+) gt S^(2-) gt Cl^(-)`
C. `Cl^(-) gt S^(2-) gt Ca^(2+) gt K^(+)`
D. `S^(2-) gt Cl^(-) gt K^(+) gt Ca^(2+)`

Answer

D