What is the name of the national anthem of the UK?

The national anthem of the UK is "God Save the King" (or "God Save the Queen," depending on the current monarch). This anthem has a long-standing tradition and is firmly associated with British identity and heritage. It is played at important state occasions, ceremonies, and public events, symbolizing the unity of the nation and its monarchy.

The title reflects the anthem's focus on the sovereignty and protection of the reigning monarch, making it an essential part of the UK's cultural fabric. Its significance extends beyond mere musical composition; it embodies the nation's history, values, and aspirations throughout centuries of monarchy.

The other choices, while linked to British culture, do not serve as the national anthem. "Land of Hope and Glory" and "Rule Britannia" are patriotic songs often sung at events like the Last Night of the Proms, and "Jerusalem," a hymn with themes of social justice and national pride, is frequently used in various contexts but does not hold the official status of the national anthem.