The National Social Conference was founded during the Indian freedom struggle primarily because the Indian National Congress (INC) wanted to separate social reform discussions from political discussions.

Option 1 implies that it was formed by social service organizations in Bengal merging into a singular body. This is incorrect as the National Social Conference was a nationwide body, not restricted to Bengal.

Option 2 is correct because it correctly identifies that the INC, while campaigning for political independence, did not want to tie social reform discussions to its primary agenda. Therefore it decided to form a separate body, the National Social Conference, to deal with social reform issues.

Option 3 suggests that Behramji Malabari and M.G. Ranade were the sole reason for the organization`s formation, which is untrue as it was primarily an initiative by the INC.

Option 4 suggests that none of the above statements are correct in this context, which is also incorrect because Option 2 correctly states the reason for the formation of the National Social Conference.