Statement I : The mobilities of Na⁺ ions is lower than that of K⁺ ion in fused state
Statement II : The ionic mobilities are independent on the effective radius of the ion

In fused state [liquid state]
The sizes of ions: Li⁺ < Na⁺ < K⁺ < Rb⁺ < Cs⁺
Mobility of  Na⁺ ions is greater than that of K⁺ ions
Size of ions $\infty$ mobilities of ions $\infty$ conductivitives of ions
Ionic mobilities are dependent of the effective radius of the ion
Statement - I & Statement - II are incorrect