The correct answer is Raja Rammohan Roy. Explanation & Key Takeaways: • Raja Rammohan Roy was a pioneer of social reform in India. • He was an outspoken critic of practices such as Sati, child marriage, and caste discrimination. • Rammohan Roy described Sati as "murder with the consent of the scriptures." • His efforts led to the abolition of Sati under the leadership of Lord William Bentinck in 1829. Related Concepts: • Lord Bentinck: He was the Governor-General of India from 1828 to 1835. Under his administration, the practice of Sati was formally abolished by the Bengal Sati Regulation Act of 1829. He played a key role in implementing the social reform advocated by Raja Rammohan Roy. • Mahatma Phule: Jyotirao Phule was a social reformer and activist who worked against caste discrimination and the oppression of women. He is known for establishing the first school for girls in India and advocating for the rights of the downtrodden, but he did not specifically focus on the issue of Sati. • Ishwarchandra Vidyasagar: Vidyasagar was a prominent social reformer who worked towards improving the status of women in India. He was instrumental in advocating widow remarriage and education for women, but his contributions were distinct from the abolition of Sati.