The relation "less than” in the set of natural numbers is
Only transitive
Since x < y , y < z ⇒ x < z - x , y ,z ∈ N
∴ xRy, yRz ⇒ x R z , ∴ Relation is transitive
∴ x < y does not give y < x .
∴ Relation is not symmetric.
Since x < x does not hold , hence relation is not relfexive .