Final answer:
The statement is false; 'God Save the Queen' originated earlier than 1875 and became the de facto UK national anthem through tradition rather than formal adoption.
Step-by-step explanation:
The statement that "The first national anthem was 'God Save the Queen' which was adopted by Great Britain in 1875" is false. Though 'God Save the Queen' (or 'King', depending on the reigning monarch's gender) has long been recognized as the national anthem of the United Kingdom, its origins date back much earlier than 1875. The anthem's origins are somewhat unclear, but it was in use by the mid-18th century and became popular after an arrangement by Thomas Arne in 1745. The United Kingdom, in reality, has never formally adopted 'God Save the Queen' through a parliamentary act or official proclamation; instead, it has assumed the status of a national anthem through tradition and usage over time.