What is the diplomatic status of the UN Secretary-General?

The correct choice describes the diplomatic status of the UN Secretary-General as Chief Diplomatic Officer. This role is crucial because the Secretary-General is not only a high-ranking official but also represents the United Nations at various international platforms. The Secretary-General's responsibilities include facilitating diplomatic dialogue, promoting peace, and addressing global issues, which is integral to their duties as the chief representative of the UN.

Furthermore, the title emphasizes the Secretary-General's role in diplomatic negotiations and conflict resolution, making them a significant figure in international relations. They can engage with heads of state and other global leaders, advocating for the goals of the United Nations while reinforcing its values.

In contrast, designating the position as simply an employee or ambassador does not fully capture the authority or the scope of responsibilities associated with the role. Similarly, being termed a head of state is misleading, as the Secretary-General does not govern a nation but rather leads an international organization dedicated to global cooperation and diplomacy.