Correct option is A
The partition of Bengal came into effect on 16th October 1905, under the orders of Lord Curzon, the then Viceroy of India. The partition divided Bengal into two provinces:
Eastern Bengal and Assam, with Dacca (now Dhaka) as its capital.
West Bengal, which retained Calcutta as its capital.
The official reason for the partition was to improve administrative efficiency, but it was widely seen as an attempt to weaken Hindu-Muslim unity and curb the growing nationalist movement in Bengal.
Key Events:
The decision was announced in 1903 and finalized in 1904.
Strong opposition to the partition led to the Swadeshi Movement and widespread protests.
The partition was annulled in 1911 due to the rising pressure from the Indian nationalist movement.