Let R be a relation on the set N of natural numbers defined by aRb if a divides b. Then R is:

Let R be a relation on the set N of natural numbers defined by aRb if a divides b. Then R is:

• A. Reflexive and symmetric
• B. Transitive and symmetric
• C. Equivalence relation
• D. Reflexive and transitive

Answer: D) Reflexive and transitive

Explanation: Every number divides itself, so R is reflexive. If a divides b and b divides c, then a divides c, so R is transitive. However, 2 divides 4 but 4 does not divide 2, so it is not symmetric.