Concept:Professor Ibrahim Gambari held a United Nations advisory position that focused specifically on the African continent.
Explanation:In 1999, the United Nations Secretary-General appointed Professor Ibrahim Gambari as Special Adviser on Africa.
His assignment concentrated on African affairs, covering the continent's political, economic, and social challenges.
He also supported peace initiatives, conflict prevention, and sustainable development across African nations.
Another useful clue is that Gambari, a Nigerian professor and diplomat, later served as Under-Secretary-General for Political Affairs in 2005.
This background confirms that his specialised role was devoted to Africa, not to general security matters, broad political and social matters, or the Economic Commission for Africa.
Answer:B. African affairs