The Commonwealth of Nations was initially known as

Analyze the question: The question asks for the earlier name of the Commonwealth of Nations.

Explain the concept: The Commonwealth began as an association of countries that were once part of the British Empire. The Balfour Declaration of 1926 and the Statute of Westminster of 1931 recognised the dominions (Canada, Australia, New Zealand, South Africa, etc.) as autonomous communities within the "British Commonwealth of Nations". This name was used for decades. In 1949, the London Declaration dropped the word "British", which allowed republics such as India to remain members. The association then became simply "The Commonwealth of Nations", or "The Commonwealth".

Solution (step by step):

1. League of Nations (D): This was a separate international organisation created after World War I in 1920. It was the forerunner of the United Nations, not of the Commonwealth. Eliminate it.
2. Commonwealth Realm (C): This term refers to a country that has the monarch as its head of state (e.g., Canada, Australia). It describes a type of member state, not an earlier name of the organisation. Eliminate it.
3. Imperial Commonwealth (B): This was never the official name. Eliminate it.
4. British Commonwealth (A): This was the earlier name, used from the 1920s-30s until "British" was dropped in 1949.

Answer: The Commonwealth of Nations was initially known as the British Commonwealth.

Exam tip: Remember the pattern British Commonwealth → Commonwealth of Nations (1949). The word "British" was dropped when India became a republic and stayed on as a member. Also, do not confuse the League of Nations (pre-WWII) with the United Nations (post-WWII).