Jyotiba Phule was a prominent social reformer who led the movement against prevailing caste restrictions in India. He revolted against Brahmin domination and fought for the rights of peasant and other low caste members. Gandhi championed for the cause of untouchables. Dr. B.R. Ambedkar fought against disparities in society and discrimination of Dalits. He motivated people to fight against slavery, injustice themselves. Periyar E. V. Ramasamy was a social activist who led the self-respect movement and Dravidar Kazhagam. He fought against Brahminical dominance, women oppression and caste inequalities in Tamil Nadu. All four leader worked to remove caste inequalities. Hence option B is the correct answer.