Final answer:
A relation on set X can be reflexive, symmetric, transitive, or none of the above.
Step-by-step explanation:
A relation r on set X is defined as xRy if and only if _______. The nature of relation R can be determined by examining its properties. Reflexive, Symmetric, and Transitive are properties of relations. A relation is considered Reflexive if every element is related to itself; Symmetric if for every element x and y, xRy implies yRx; and Transitive if for every elements x, y, and z, if xRy and yRz hold, then xRz holds.