Which of the following relations represents a function?
a {(2, 3), (1,3), (3, 3) }
c. {(1, 3), (2, 3), (1,4)}
b. {(1,3), (2, 3), (2, 4) }
d. {(2, 2), (2, 3), (2, 1) }
Please select the best answer from the choices provided
Α
B
С
D