Which of the relations given by the following sets of ordered pairs is a function? O {(1, 2), (2, 3), (3, 4), (2, 1), (1, 0)) O {(2,8), (6, 4), (-3, 9), (2, 0), ( – 5,3)} O {(-2,5), (7, 5), (-4, 0), (3, 1), (0, -6)} O {(1, -3), (1, 1), (1, 1), (1, 3), (1,5)} -​