Which of the following pairs relating to Raja Rammohun Roy is correct…

The correct answer is Option (2) → Campaign against sati - first women's issue to receive public attention

Option (1) Campaign against sati - began a decade after the Brahmo Samaj was set up — Incorrect. The order is reversed. Roy began the campaign against sati a decade before he set up the Brahmo Samaj in 1828.

Option (2) Campaign against sati - first women's issue to receive public attention — Correct. Roy's campaign against sati was the first women's issue in modern India to receive public attention. It came about ten years before the Brahmo Samaj was founded.

Option (3) Roy's mixture of ideas - a response to the Bhakti reform tradition — Incorrect. Roy's ideas mixed Western rationality with an assertion of Indian traditionality. Both trends are placed in the context of a response to colonialism.

Option (4) Starting point of social reform in Bengal - the widow remarriage movement — Incorrect. Roy's own attempts to reform society, religion and the status of women are the starting point of social reform in Bengal. The widow remarriage movement belonged to the Bombay Presidency.