Q. Let R = {(3, 3), (6, 6), (9, 9), (12,12), (3,6), (6,3), (3, 9), (9, 3), (9, 12),(12,9)} be a relation on the set A = {3, 6, 9, 12}. The relation is _________

• (A) reflexive and transitive
• (B) reflexive and symmetric
• (C) symmetric and transitive
• (D) equivalence relation