Who was the first Scottish King of England?

The correct answer is James VI, who became the first Scottish King of England upon his accession to the English throne in 1603. He was originally the King of Scotland, having been crowned as James VI in 1567. Following the death of Queen Elizabeth I, who left no heirs, James VI was chosen as her successor due to his direct lineage. This marked the union of the crowns of Scotland and England, creating a personal union under James's rule, and he took the name James I of England.

This historical event is significant because it laid the groundwork for the future political unification of Scotland and England. James's reign initiated a new era that would eventually lead to the formation of the Kingdom of Great Britain in 1707. The other figures mentioned, while historically important, did not hold the title of a Scottish King ruling over England in this context.