Step 1: Background.
The demand for a Constituent Assembly was first raised by M. N. Roy in 1934 and later supported by the Congress. After World War II, the British government agreed to form such an assembly.
Step 2: Cabinet Mission Plan.
In 1946, the Cabinet Mission Plan was sent by the British government to India. It proposed the setting up of a Constituent Assembly elected indirectly by provincial legislatures to draft the Constitution of India.
Step 3: Analyze options.
- (A) Indian Independence Act, 1947: Gave independence to India, but Constituent Assembly was already functioning by then.
- (B) Mountbatten Plan: Concerned with partition, not formation of Constituent Assembly.
- (C) Cabinet Mission Plan: Correct. It led to the establishment of the Constituent Assembly.
- (D) Wavell Plan: 1945 plan, related to interim government, not the Constituent Assembly.
Step 4: Conclusion.
The Constituent Assembly was formed under the Cabinet Mission Plan of 1946.