Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Let 
and 
be to logical expressions. Then :
A
is not a tautology but 
is a tautology B
is a tautology but 
is not a tautology C
and 
both area tautologies D
Both 
and 
are not tautologies
and are not tautologies
Text Solution
Verified by ExpertsThe correct answer is:
A
1. a JEE Main 2021
Not a tautology
Truth table for 
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not shows tautology and 
shows tautology
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