(c) Reflexive and transitive onlyHere A = {3, 6, 9, 12} and R = {(3, 3), (6, 6), (9, 9), (12, 12), (6, 12), (3, 12), (3, 6)} • ∵ (3, 3), (6, 6), (9, 9), (12, 12) all belong to R ⇒ {(a, a): ∈R V a ∈A} ⇒ R is reflexive • (3, 6) ∈ R but (6, 3) ∉R. Also (6, 12) ∈ R but (12, 6) ∉R. So (a, b) ∈R ⇒ (b, a) ∈R Hence R is not symmetric Now (3, 6) ∈ R, (6, 12) ∈ R and (3,12) ∈ R ⇒ (3, 12) ∈ R (x, y) ∈ R, (y, z) ∈ R ⇒ (x, z) ∈ R Hence R is transitive.