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The collection of all subsets of a set is called its:

APrime set
BWhole set
CUnion set
DPower set
Answer & Solution
Correct answer: D. Power set
1. Each subset of the set is gathered as a member. 2. The result is itself a set, whose members are sets. 3. That is the power set. _Source: syllabus Mathematics, Chapter 1, Sets._
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