In a family, the relation 'is a sister of' on the set of all children is:
In a family, the relation 'is a sister of' on the set of all children is:
- A. Reflexive
- B. Symmetric
- C. Transitive
- D. Equivalence
Answer: C) Transitive
Explanation: Not reflexive (one cannot be her own sister). Not symmetric (if A is B's sister, B could be A's brother). It is transitive (if A is B's sister, and B is C's sister, A is C's sister).
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