Concept:The Cabinet Mission of 1946 proposed a federal plan for India to facilitate the transfer of power.
Explanation:The Cabinet Mission was sent to India in 1946 to negotiate the transfer of power from British rule to Indian leaders.
It proposed a two‑tiered federal plan: a central government and provincial governments with maximum regional autonomy.
A federation of provinces and princely states would exist, with a strong federal centre controlling defence, foreign affairs and communications.
Individual provinces were allowed to form regional unions by mutual agreement, to which they could surrender some of their powers.
All four statements accurately describe the Cabinet Mission's proposals.
Therefore, statements 1, 2, 3 and 4 are correct.
Answer:Option D: 1, 2, 3 and 4