Select the correct answer.
Which relation is a function?
Ο Α.
B.
{(2, 3), (1, 5), (2, 7))
((-1, 5), (-2, 6), (-3, 7))
OC.
((11.9), (11, 5), (9, 3))
OD. ((3, 8), (0, 8), (3,-2))
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