Explanation:

Partition of Bengal, (1905), division of Bengal carried out by the British viceroy in India, Lord Curzon, despite strong Indian nationalist opposition. It began a transformation of the Indian National Congress from a middle-class pressure group into a nationwide mass movement.

King George V abrogated Curzon's Act as the Royal Durbar in Delhi in 1911, the year that the capital was shifted from Calcutta (now Kolkata) to Delhi, east and west Bengal were reunited; Assam again became a chief commissionership, while Bihar and Orissa were separated to form a new province. The aim was to combine appeasement of Bengali sentiment with administrative convenience.