The umbrella body for relations among all African countries is

Step 1: Analyze the question The question asks for the "umbrella body" that covers relations among all African countries. So we need an organisation whose membership spans the whole continent, not just one region or one group of nations.

Step 2: Evaluate each option

• A. Commonwealth: This is an association of mostly former British colonies from across the world (Africa, Asia, the Caribbean, Europe, and the Pacific). It is not exclusively African.
• B. ECOWAS: The Economic Community of West African States is a regional body for West Africa only (e.g., Nigeria, Ghana, Senegal).
• C. UNO: The United Nations Organisation is a global body with members from every continent.
• D. AU: The African Union is a continent-wide organisation made up of African states. It replaced the Organisation of African Unity (OAU) in 2002 and is headquartered in Addis Ababa, Ethiopia.

Step 3: Identify the answer Only the African Union covers all African countries and is focused on African affairs, so it is the umbrella body for relations among African states.

Exam tip: Match the scope of the organisation to the question:

• Global → UNO
• Continental (Africa) → AU
• Regional (West Africa) → ECOWAS
• Former British colonies → Commonwealth

Also remember: OAU (1963) → AU (2002). JAMB often tests this change.