The relation “less than” in the set of natural number is

x < y, y < z ⇒x < z ∀ x, y, z ∈ NTherefore, xRy, yRz ⇒xRz,   Therefore Relation is transitive,Therefore x < y does not give y < x.Relation is not symmetric.Since x < x does not hold, hence relation is not reflexive.