Background:
The All India Scheduled Castes Federation was a political party in India that was formed to represent the interests of the Scheduled Castes (Dalits). The party emerged in the 1940s and played a significant role in advocating for the rights and empowerment of Dalits.

Explanation:
The correct answer to the question is option 'C', B.R. Ambedkar. Bhimrao Ramji Ambedkar, popularly known as Dr. B.R. Ambedkar, was a social reformer, jurist, and politician. He is widely regarded as the architect of the Indian Constitution and a champion of Dalit rights.

Formation and Objectives:
The All India Scheduled Castes Federation was organized by B.R. Ambedkar in 1942. The primary objective of the federation was to fight for the rights and upliftment of the Scheduled Castes, who had been marginalized and oppressed for centuries. Ambedkar understood the importance of political representation for Dalits and believed that a separate political party was necessary to address their specific needs and concerns.

Advocacy and Achievements:
Under the leadership of B.R. Ambedkar, the All India Scheduled Castes Federation campaigned for various social and political reforms. The party advocated for the eradication of untouchability, equal rights for Dalits, and reservation of seats in legislatures and government jobs. Ambedkar also fought for the rights of women and proposed progressive measures such as divorce and inheritance rights for women.

The All India Scheduled Castes Federation played a significant role in the struggle for Dalit rights and social justice. It mobilized Dalit communities, organized protests, and represented their interests at various political forums. The party's efforts were instrumental in securing reservation for Scheduled Castes in government jobs and educational institutions through the provisions of the Indian Constitution.

Legacy:
The All India Scheduled Castes Federation served as a platform for Dalit empowerment and social reform. It laid the foundation for the political mobilization of Dalits and paved the way for the formation of subsequent Dalit political parties and movements. B.R. Ambedkar's leadership and the work of the federation continue to inspire and guide the Dalit movement in India today.