Partition of Bengal held in _____.

The correct answer is Option 3- 1905

The Partition of Bengal was implemented by the British colonial authorities on October 16, 1905. This administrative partition divided the Bengal Presidency of British India into two separate entities: the predominantly Hindu-majority province of Bengal, with its capital in Calcutta (now Kolkata), and the predominantly Muslim-majority province of East Bengal and Assam, with its capital in Dhaka (now the capital of Bangladesh).