What among the following statements describing the increasing order of metallic character of elements is true?

The increasing order of the metallic character of elements is —
Ge < Ga < Mg < Ca < K

As we go across the period, the metallic character decreases as the effective nuclear charge on the valence electrons of the element increases. Hence, as K, Ca, Ge, and Ga all lie in the fourth period of the Modern Periodic Table, the increasing order of their metallic character is as follows:
Ge < Ga < Ca < K

As we go down the group, the metallic character increases as the effective nuclear charge on the valence electrons of the element decreases. We know that Ca and Mg are elements of group 2 of the Modern Periodic Table.

Hence, the increasing order of their metallic character is as follows: 
Mg < Ca

Hence, the overall increasing order of metallic character is as follows: 
Ge < Ga < Mg < Ca < K