The relation $R = \{(1, 1), (2, 2), (3, 3)\}$ on the set $\{1, 2, 3\}$ is
Answer & explanation
Correct answer: option 3
Clearly, R is the identity relation on set $\{1, 2, 3\}$ and the identity relation is always an equivalence relation.
Hence, R is an equivalence relation.