The relation R = {(1, 1), (2, 2), (3, 3), (1, 2), (2, 3), (1, 3)} on a set A = {1, 2, 3} is
1
reflexive transitive but not symmetric
2
reflexive, symmetric but not transitive
3
symmetric, transitive but not reflexive
4
reflexive but neither symmetric not transitive