Hint: What is the domain of f and what is the range of f?
Let f: {a,b,c} -> {1,2,3} be a function defined by f={(a, 1), (b, 2), (c, 3)}. Which of the following is NOT true?
a. The range of f is equal to its domain.
b. f is a bijection.
c. f is one-to-one.
d. The image of f is equal to its codomain.