allerySets that are not equal are said to be:
AUnstable
BUnrelated
CUnequal
DUnusual
Answer & Solution
Correct answer: C. Unequal
1. Equality either holds or it does not.
2. The failing case is named directly.
3. Otherwise, the sets are said to be unequal.
4. So the answer is unequal.
_Source: syllabus Mathematics, Ch 1 'Sets'_
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