Question

If $f:A\to B$ is a function such that $B\subseteq f\left(A\right)$, then the function f is

• A. Into
• B. Onto
• C. Bijective
• D. Many-one

Answer 1

The correct option is B Onto

If $f:A\to B$ $f\left(A\right)\subseteq B$
But given that $B\subseteq f\left(A\right)$
therefore f(A) = B
Hence f is surjective