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In Z, the relation R = {(x, y): x - y is an integer} is
ASymmetric but not reflexive
BReflexive but not symmetric
CTransitive but not reflexive
DAn equivalence relation
Answer & Solution
Correct answer: D. An equivalence relation
x - x = 0 is an integer, negating an integer gives an integer, and the sum of two integers is an integer, so all three properties hold.
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