The correct answer is Surendra Nath Banerjee .

The correct answer to this question is option 1) Surendra Nath Banerjee.

The partition of Bengal was announced on 19 July 1905 by Lord Curzon, the then Viceroy of India. The decision to partition Bengal was made on the basis of administrative convenience, but it had political and economic motives as well. The partition was strongly opposed by many Indian leaders, who saw it as a deliberate attempt to divide the Hindus and Muslims of Bengal and weaken their nationalist movement.

Surendra Nath Banerjee was one of the most prominent leaders of the Indian National Congress at that time, and he led the agitation against the partition of Bengal. Banerjee was a lawyer by profession and had a deep interest in politics. He was one of the founding members of the Indian National Congress and served as its president twice, in 1895 and 1902.

Banerjee organized protests and demonstrations against the partition of Bengal and traveled extensively to mobilize public opinion. He formed the Bengal Provincial Conference, which brought together leaders from different parts of Bengal to oppose the partition. Banerjee’s leadership and organizing skills played a crucial role in the anti-partition movement.

Other leaders such as Surendranath Banerjee’s close associate, Rabindranath Tagore, also opposed the partition of Bengal and expressed their dissent through their writings and speeches. C.R. Das and Ashutosh Mukherjee were also prominent leaders of the Indian nationalist movement, but they were not directly involved in the agitation against the partition of Bengal.

In conclusion, Surendra Nath Banerjee was the leader of the agitation against the partition of Bengal in 1905, and his efforts played a significant role in mobilizing public opinion against the partition.