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Study Stuff for MCA Examinations - NIMCET
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Consider the following relations on ${1,2,3,4}$. Which of the following relations are reflexive ?
(A)
$R_1={(1,1),(1,2),(2,1),(2,2),(3,4),(4,1),(4,4)}$
(B)
$R_2={(1,1),(1,2),(2,1)}$
(C)
$R_3={(1,1),(1,2),(1,4),(2,1),(2,2),(3,3),(4,1),(4,4)}$
(D)
$R_4={(2,1),(3,1),(3,2),(4,1),(4,2),(4,3)}$
(E)
$R_5={(1,1),(1,2),(1,3),(1,4),(2,2),(2,3),(2,4),(3,3),(3,4),(4,4)}$
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