Which relation shown is not a function?
O {(14, 15). (5. 7). (3. 10). (11, 1). (3.8)}
O {(1, 1), (2, 2), (3, 3), (4. 4), (5,4)}
O {(14, 15). (5, 7), (3, 10), (11, 1), (6, 10)}
O {(14, 15). (5. 15). (3. 15). (11, 15). (5, 15)}