One of these is not an organ of the Commonwealth of Nations

Analyze the question: We need the option that is NOT an organ of the Commonwealth of Nations.

Concept: The Commonwealth is a voluntary association of mostly former British territories. Its main bodies include:

• Commonwealth Heads of Government Meeting (CHOGM), held every two years, where the leaders of member states meet.
• Commonwealth Secretariat, the main administrative and executive organ, headed by the Secretary-General and based in London.
• Commonwealth Fund for Technical Co-operation (CFTC), the main channel for technical assistance to member states.
• Ministerial meetings, such as those of finance and education ministers, and other associated bodies.

Going through the options:

• A. Assembly of Heads of State and Government: The Commonwealth's top meeting is called the Commonwealth Heads of Government Meeting (CHOGM). "Assembly of Heads of State and Government" is not its name. It is more like the name used by other organisations, such as the African Union's Assembly of Heads of State and Government. So it is not a Commonwealth organ.
• B. Commonwealth Secretariat: This is a real organ.
• C. Conference of Prime Ministers: This was the old name for the meetings of Commonwealth leaders before they became CHOGM. It is a recognised Commonwealth organ historically, and is the one used in older textbooks.
• D. Fund for Technical Co-operation: The CFTC is a real Commonwealth body.

Answer: The odd one out is the Assembly of Heads of State and Government, which belongs to organisations like the AU, not the Commonwealth.

Exam tip: For "which is not an organ" questions, link each name to its parent body. "Assembly of Heads of State and Government" belongs to the AU (and ECOWAS uses "Authority of Heads of State and Government"). For the Commonwealth, remember CHOGM, Secretariat, CFTC.