Statement I : The mobilities of Na+ ions is lower than that of K+ ion in fused stateStatement 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+ ionsSize of ions ∞ mobilities of ions ∞ conductivitives of ionsIonic mobilities are dependent of the effective radius of the ionStatement - I & Statement - II are incorrect