The drain theory of Dadabhai Naoroji was formally accepted in which among the sessions of the Indian National Congress?
[A] Benaras session, 1905
[B] Calcutta session, 1906
[C] Surat session, 1907
[D] None of the above

None of the above
The drain theory of Dadabhai Naoroji was formally accepted in 1896 Calcutta session of the Indian National Congress. This session was presided by Rahimtulla M. Sayani, who became Second Muslim to become President of Indian National Congress after Badruddin Taiyyabji.