Let A={a,b,c}. Let the relation R={(c,b),(a,a),(b,c)}.
Since (b,b)∈/R, we conclude that the relation R is not reflexive. Taking into account that (b,c)∈R and (c,b)∈R, but (b,b)∈/R, we conclude that R is not transitive. Since (b,c)∈R implies (c,b)∈R and (a,a)∈R implies (a,a)∈R, the relation R is symmetric.
Answer: d
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