The correct sequence which shown decreasing order of the ionic radii of the elements is

Options

A. `Al^(3+) gt Mg^(2+) gt Na^(+) gt F^(-) gt O^(2-)`
B. `Na^(+) gt Mg^(2+) gt AI^(3+) gt O^(2-) gt F^(-)`
C. `Na^(+) gt F^(-) gt Mg^(2+) gt O^(2-) gt AI^(3+)`
D. `O^(2-) gt F^(-) gt Na^(+) gt Mg^(2+) gt AI^(3+)`

Answer

D