Step 1: Understanding the Concept:
The query requires the identification of a 'reformist' social movement. A reformist movement aims to enact changes within the existing social and political structures. This is typically achieved by advocating for new legislation or policies, rather than by seeking to dismantle the entire system.
Step 2: Detailed Explanation:
(A) Right To Information (RTI): The movement advocating for RTI in India sought the enactment of a law granting citizens access to government information. Its objective was to enhance transparency and accountability within the existing democratic framework. The movement operated within the constitutional boundaries to achieve its aims. This is a quintessential example of a reformist movement.
(B) Bolshevik Revolution: This was a revolutionary movement aiming for the complete overthrow of the Tsarist autocracy and the capitalist system in Russia, to be replaced by a communist state.
(C) Naxalite Movement: This Indian movement advocates for the overthrow of the parliamentary democratic state through armed conflict, with the goal of establishing an alternative political system.
(D) Anti-abortion Movement: This movement seeks to alter legislation pertaining to abortion. While it operates within the established system akin to a reformist movement, it is frequently categorized as a 'reactionary' movement due to its objective of reversing a social change (the legalization of abortion) and reinstating prior social norms. In contrast to the RTI movement, which represents a clear instance of progressive reform, its categorization can be more intricate. However, the RTI movement stands out as the most unambiguous example of a reformist movement among the presented options.
Step 3: Final Answer:
The Right To Information movement serves as a clear illustration of a reformist social movement, as its objective was to enhance the existing governance system, not to replace it.