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The universal set for the integers can be taken as the:
ASquares
BRationals
CNaturals
DPrimes
Answer & Solution
Correct answer: B. Rationals
1. The universal set must contain everything under discussion.
2. Every integer is also a rational number.
3. So the rationals can serve as the universal set.
_Source: NCERT Class 11 Mathematics, Chapter 1, Sets._
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