In the 19th century, who attacked the practice of sati on the basis of both humanitarian and natural rights doctrines as well as Hindu shastras?

Raja Ram Mohun Roy

The correct answer is Option 3: Raja Ram Mohun Roy

Raja Ram Mohun Roy opposed the practice of sati by combining humanitarian and natural rights arguments with references to Hindu shastras, making his campaign a distinctive feature of the 19th-century social reform movement.