Who among the following had founded the Atmiya Sabha?

Early 19th-century Bengal saw a wave of socio-religious reform: individual reformers first organised informal discussion groups to debate Vedantic monotheism and challenge idolatry, caste rigidity and social evils, only later formalising into structured organisations.

Raja Ram Mohan Roy organised the Atmiya Sabha (‘Society of Friends’) in Calcutta in 1815. It functioned as an informal assembly of like-minded thinkers who met to discuss the Upanishads, oppose idol worship, and campaign against social practices such as sati and rigid caste distinctions. This body directly preceded the more structured Brahmo Sabha that Ram Mohan Roy founded in 1828, later renamed the Brahmo Samaj.

• M. G. Ranade helped drive the Prarthana Samaj and the Poona Sarvajanik Sabha in western India decades later, not the Atmiya Sabha.

• Devendranath Tagore joined the Brahmo Samaj in the 1840s and gave it a structured doctrine (Brahmo Dharma) in 1843 — a different, later organisation.

• Atmaram Pandurang co-founded the Prarthana Samaj in Bombay in 1867, more than five decades after the Atmiya Sabha was formed.

So among the options, only Raja Ram Mohan Roy matches the founder of the Atmiya Sabha.