Concept:The practice of Sati was banned in 1829 due to the persistent efforts of social reformers, especially Raja Rammohan Roy.
Explanation:Sati involved a widow being burnt alive on her husband’s funeral pyre.
Raja Rammohan Roy witnessed his sister-in-law’s immolation and began campaigning against Sati from 1812.
He argued that ancient Hindu scriptures did not support Sati and wrote articles in his journal
Sambad Kaumudi demanding its ban.
He convinced the British administration to act.
Lord William Bentinck, the Governor-General, passed a law in 1829 that made Sati illegal throughout British India.
Thus, Raja Rammohan Roy’s advocacy was key to the ban.
Answer:A. Raja Rammohan Roy