On R, the relation $$\rho$$ be defined by 'x$$\rho$$y holds if and only if x $$-$$ y is zero or irrational'. Then,
- A$$\rho$$ is reflexive and transitive but not symmetric
- B$$\rho$$ is reflexive and symmetric but not transitive
- C$$\rho$$ is symmetric and transitive but not reflexive
- D$$\rho$$ is equivalence relation
✓ Correct answer: B
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