Explanation:

Commonwealth of Nations

• It is an international intergovernmental organization of countries that were mostly former territories of the British Empire and dependencies.
• It was established by the London Declaration in 1949.
• Queen Elizabeth II is the head of the Commonwealth.
• The current membership includes 54 Countries. The membership is based on free and equal voluntary co -operation.
• It is home to 2.5 billion people, and includes both advanced economies and developing countries.
• The last country to join the Commonwealth was Rwanda in 2009.
• The Commonwealth Heads of Government Meeting is a biennial summit meeting of the heads of government from all Commonwealth nations.

Hence all statements are correct.