The relation $R=\{(1,1),(2,2),(3,3),(1,2),(2,3),(1,3)\}$ on a set $A$ $=\{1,2,3\}$ is

• Correct answer
  A

  reflexive, transitive but not symmetric
• B

  reflexive, symmetric but not transitive
• C

  symmetric, transitive but not reflexive
• D

  reflexive but neither symmetric nor transitive

Hence, the correct answer is option: 'A'.