OPTION is 2 i.e., Kesava Chandra Sen.Kesava Chandra Sen was the founder of the Indian Reform Association' in 1870.Kesava Chandra Sen became a member of the Brahmo Samaj in 1856.In 1854, Keshub Chunder Sen became the secretary of the Asiatic Society.Kesava Chandra Sen established the British India Society in 1855.Indian Reform Association:The Indian Reform Association was formed on 29 October 1870.Indian Reform Association REPRESENTED the secular side of the Brahmo Samaj and INCLUDED MANY who did not belong to the Brahmo Samaj.