Question

If $f:A\to B$ is surjective then

• A. no two elements of A have the same image in B
• B. Every element in A has an image in B
• C. every element of B has at least one pre-image in A
• D. A and B are finite non empty sets

Answer 1

Answer: (C)

Correct answer is (c) every element of B has at least one pre-image in A