If \( N \) denote the set of all natural numbers and \( R \) the relation on \( N \times N \) defined by \( (a, b) R (c, d) \), if \( a(b + c) = b(a + d) \), then \( R \) is
Show Hint
An equivalence relation must be reflexive, symmetric, and transitive.
Step 1: Verifying equivalence properties.
The relation satisfies the reflexive, symmetric, and transitive properties. Therefore, it is an equivalence relation.
Step 2: Conclusion.
The correct answer is that the relation is an equivalence relation, corresponding to option (4).