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A relation R in set A={1,2,3} is defined...

A relation R in set `A={1,2,3} `is defined as `R={(1,1),(1,2),(2,2),(3,3)}`. Which of the following
ordered pair should be removed to make it an equivalence
relation?
A. (1,1)
B. (1,2)
C. (2,2)
D. (3,3)

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