In 1881, Keshab Chandra Sen established NabaBidhan (New Dispensation) meaning new universalist religion after having differences within BrahmoSamaj. He was also part of Indian reform association to legalize Brahmo marriage and to fix minimum age of marriage. Calcutta Unitarian Committee was formed by Raja Rammohan Roy, Dwarkanath Tagore and William Adam, hence irrelevant to the question. Hence Answer (b) only 2 and 3.