The correct answer is 1885. Allan Octavian Hume was a retired English ICS officer, formed the Indian National Union in 1885. The idea of the Indian National Union took shape and Hume initially had some support from Lord Dufferin for this, although the latter wished to have no official link to it. In March 1885, when a notice was first issued to convene the first Indian National Union to meet at Poona the following December. In May 1885, Hume secured the viceroy's approval to create an "Indian National Union", which would be affiliated with the government and act as a platform to voice Indian public opinion. ? AO HumeSome important facts about Indian National Congress:Foundation - 1885, 28 December. Place - Gokul Das Tejpal Sanskrit College, Bombay. Viceroy - Lord Dufferin. Founding Members - 72. First President - Womesh Chandra Banerjee. Father - A O Hume.