Terms for subject Informal containing question is

English	Russian
that is the right question	вот это и свербит (Mikhail11)
that's out of the question	и думать нечего (Andrey Truhachev)
that's out of the question	Исключено (Tamerlane)
that's out of the question	это не обсуждается! (Andrey Truhachev)
there was no question of that!	куда там!