[" Let "f:{1,2,3,4,5}rarr{1,2,3,4,5}" is such that "f(x)" is a one-one function satisfying following condition "],[f(x)=x+1" if and only if "x" is even (i.e."f(3)!=4,f(4)=5" etc.) Then "f^(-1)(2)" can be- "],[[" (A) "1," (B) "3],[" Which of the following statement(s) is(are) correct? "],[" (A) If is a one-one mapping from set "A" to A,then f is onto."],[" (B) If "f" is an onto mapping from set "A" to "A," then "f" is one-one "],[" (D) Let and "g" be two functions defined from "R rarr R" such that gof is injective,then f must be injective."],[" is "8.]]