The correct order of ionic mobility of the following ions in their aqueous solution is-

Options

A. `Na^(+) gt K^(+) gt Rb^(+) gt Cs^(+)`
B. `K^(+) gt Na^(+) gt Rb^(+) gt Cs^(+)`
C. `Cs^(+) gt Rb^(+) gt K^(+) gt Na^(+)`
D. `Rb^(+) gt K^(+) gt Cs^(+) gt Na^(+)`

Answer

C