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10. Which of the following is a MERE
RELATION/NOT a FUNCTION?
A. (1.1): (2, 2), (3, 3), (4.4)
B. (2, 1): (3, 1): (4.2): (-3,-5)
C.(-2,7):(-1,8): (0.9); (1, 10)
D. (3.4): (2, 1): (3.-1): (1,0)​