Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Which of the following sets is a universal set?
A
Set of all points in 
-plane
-plane B
Set 
of real numbers
of real numbers C
Set 
of natural numbers
of natural numbers D
All of these
Text Solution
Verified by ExpertsThe correct answer is:
D
A universal set depends on the context of the problem.
If you're dealing with geometry → all points in the xy -plane can be the universal set.
For real number problems 
can be the universal set.
For counting/natural number problems 
can act as the universal set.
So, any of these can serve as a universal set depending on context.
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