Nigeria was a member of

Step 1: Analyze the question The question asks which organisation Nigeria belongs to (or "was a member of"). We need to match each option to its membership and see which one includes Nigeria.

Step 2: Review each option

• A. Arab League: A regional organisation of Arab states in the Middle East and North Africa (e.g., Egypt, Saudi Arabia, Algeria). Nigeria is not Arab, so it is not a member.
• B. EAC (East African Community): Made up of East African countries such as Kenya, Uganda, Tanzania, Rwanda, and Burundi. Nigeria is in West Africa, so it is not a member.
• C. NATO (North Atlantic Treaty Organization): A military alliance of North American and European countries. Nigeria is not a member.
• D. OPEC (Organization of the Petroleum Exporting Countries): Nigeria joined OPEC in 1971 because it is a major oil producer. It remains a member, with its representatives attending OPEC meetings in Vienna.

Step 3: Identify the answer Only OPEC includes Nigeria.

Step 4: Exam tip For "Nigeria is a member of..." questions, think of Nigeria's key memberships:

• Regional: ECOWAS, African Union
• Global: United Nations, Commonwealth, OPEC, NAM (Non-Aligned Movement)

Remember the pattern: organisations tied to oil (OPEC), West Africa (ECOWAS), or the Commonwealth (former British colonies) are usually the right ones for Nigeria. Organisations tied to the Arab world, East Africa, or the North Atlantic are the distractors.

Keep practising, you're doing great!