The correct option is C A.O. Hume
The Congress split into two parts-Moderates and Extremists in the year 1907 at the Surat Session of Congress. Moderates aimed at administrative and constitutional reforms while Extremists aimed at nothing short of swaraj as it existed in the United Kingdom and its self-governing colonies. Some of the extremists leaders were Bala Gangadhar Tilak, Bipin Chandra Pal and Lala Lajpat Rai, Aurobindo Ghosh. A.O. Hume did not belong to the Extremists group but was a moderate leader during the first phase (1885-1905) of INC.