MCQ
Let $A=\{1,2,3\}$ and consider the relation $R=\{(1,1),(2,2),(3,3),(1,2),(2,3),(1,3)\}$. Then $R$ is
  • reflexive but not symmetric
  • B
    reflexive but not transitive
  • C
    symmetric and transitive
  • D
    neither symmetric nor transitive

Answer

Correct option: A.
reflexive but not symmetric
(a) : $(1,1),(2,2),(3,3) \in R$
$\therefore \quad R$ is reflexive but it is not symmetric.
Also, $R$ is transitive.

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