Final answer:
The correct answer is a) Ceremonial, as the queen or king of Great Britain holds a ceremonial role while the prime minister is the true leader of the government.
Step-by-step explanation:
Although the queen or king is the ceremonial head of state, the prime minister is the real leader of the British Government. The correct answer to this question is: a) Ceremonial.
Great Britain functions as a constitutional monarchy, where the monarch, such as the queen or king, fulfills ceremonial duties within the framework of a constitution, but it is the elected prime minister who holds the leadership role in the government. The prime minister has substantial responsibility for policy and legislative development, operating within a parliamentary democracy. This distinction highlights the separation of symbolic and practical authority in the UK's governance system.