Answer: Partial order only.
- A Equivalence relation
- B Partial order only
- C Both equivalence and partial order
- D Neither
Correct answer: B. Partial order only
Explanation: Divisibility on Z+ is reflexive (a|a), antisymmetric (a|b and b|a implies a=b), and transitive. But not symmetric. So it is a partial order, not equivalence.
Concept context
Ordered pairs, Cartesian products, types of relations and functions, domain and range. Foundation for calculus and Class 12 algebra.