Let $\mathrm{R}=\left\{\left(3, 3\right), \left(6, 6\right), \left(9, 9\right), \left(12, 12\right), \left(6, 12\right), \left(3, 9\right), \left(3, 12\right), \left(3, 6\right)\right\}$

be a relation on the set $\mathrm{A}=\left\{3, 6, 9, 12\right\}.$ The relation is

• A

  An equivalence relation

• B

  Reflexive and symmetric only

• C

  Reflexive and transitive only

• D

  Reflexive only