Question

Choose the correct alternative:

Let X = {1, 2, 3, 4}, Y = {a, b, c, d} and f = {(1, a), (4, b), (2, c), (3, d), (2, d)}. Then f is

Options

• an one-to-one function

• an onto function

• a function which is not one-to-one

• not a function

Answer 1

not a function