The correct answer is (d).
Saumyendra Nath Tagore was a Bengali revolutionary who founded the Radical Democratic Party in 1930. The party was a Marxist organization that advocated for the overthrow of British rule in India. It was also opposed to the Indian National Congress, which Tagore saw as a bourgeois organization that was not interested in the interests of the working class.
The Indian Bolshevik Party was founded in 1920 by a group of Indian communists who were inspired by the Russian Revolution. The party was initially successful in organizing strikes and protests, but it was eventually suppressed by the British government.
The Revolutionary Communist Party was founded in 1940 by a group of Indian communists who were opposed to the Indian National Congress. The party was also inspired by the Russian Revolution, and it advocated for the overthrow of British rule in India.
The Bolshevik Leninist Party was founded in 1942 by a group of Indian communists who were opposed to the Indian National Congress and the Radical Democratic Party. The party was also inspired by the Russian Revolution, and it advocated for the overthrow of British rule in India.
In conclusion, the correct answer is (d). Saumyendra Nath Tagore founded the Radical Democratic Party in 1930.