Answer : 4. "The Mountbatten Plan"
Explanation :

The plan to transfer power to the Indians and the partition of the country was laid down in the Mountbatten Plan, also known as the 3 June Plan. It was proposed by the last British Viceroy of India, Lord Louis Mountbatten, and it set the groundwork for the partition of British India into two independent nations, India and Pakistan, in 1947. The plan outlined the steps for the transfer of power and the creation of two separate states based on religious lines.