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Que. Let R and S be any two equivalence relations on a non-empty set A. Which one of the following statements is TRUE?
a. R ∪ S, R ∩ S are both equivalence relations
b. R ∪ S is an equivalence relation
c. R ∩ S is an equivalence relation
d. Neither R ∪ S nor R ∩ S is an equivalence relation
Answer:R ∩ S is an equivalence relation
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