The Partition of Bengal made by Lord Curzon in 1905 lasted until
Explanation
The Partition of Bengal was officially annulled in 1911 by King George V at the Delhi Durbar to curb the rising tide of revolutionary nationalism and the Swadeshi Movement. While option (d) is a common distractor because Bengal was partitioned again during Independence in 1947, the specific 1905 administrative act ended with the reunification of Bengal (and the creation of Bihar and Orissa provinces) in 1911. This question tests the core concept of British colonial administrative shifts and the political impact of the anti-partition agitation.