Which one of the following orders represents the correct sequence of the increasing basic nature of the given oxides?

Metallic character increases down a group and decreases across a period. Basic nature of oxides follows the metallic character of the element.${\text{Al}}_2{\text{O}}_3$ is amphoteric (least basic here).$\text{MgO}$ is basic.${\text{Na}}_2\text{O}$ is strongly basic.${\text{K}}_2\text{O}$ is the most basic as K is more electropositive than Na.Order: ${\text{Al}}_2{\text{O}}_3<\text{MgO}<{\text{Na}}_2\text{O}<{\text{K}}_2\text{O}$.