Which is the largest passenger aircraft in the world till date?

Question

Tejas is tailless, want to know the advantage of tailless design (wiki is not helpful)

Answer 1

Announced in 2006 as a derivative of the Airbus A380-800. World's highest-capacity passenger aircraft in history. In May 2010, Airbus announced that A380-900 development was postponed, until production of the A380-800 has stabilised.