Let R and S be two equivalence relations on a set A. Then

1.	Let R and S be two equivalence relations on a set A. Then
A.	\[R\text{ }\cup \text{ }S\] is an equivalence relation on A
B.	\[R\text{ }\cap \text{ }S\] is an equivalence relation on A
C.	\[R-S\] is an equivalence relation on A
D.	None of these
Answer» C. \[R-S\] is an equivalence relation on A

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Let R and S be two equivalence relations on a set A. Then

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