EXAMPLE 5. If R is a relation from A={1,2,3,4} to
B = {1, 3,5), i.e. (a, b) eRa<b, then RoR is
a. {(1,3),(1,5),(2,3), (2,5),(3,5),(4,5)}
b. [(3,1),(5, 1), (3, 2),(5,2),(5,3),(5,4)}
c. {(3,3),(3,5),(5,3),(5,5)} d. {(3, 3), (3,4),(4,5)}
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Answer: C.
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