Published by:
CGP EDU Academic Team
Published on: August 11, 2026
Which of the following is incorrect?
A
~ (p 
-q) 
p 
q
-q) p q
B
(p 
-q) 
p 
q
-q) p q
C
~ (p 
q) 
~p 
q
q) ~p q
D
~ (p 
q) 
p 
~q
q) p ~q
Text Solution
Verified by ExpertsThe correct answer is:
B
Option & are theorems
Hence, & are correct
For option ,
Hence, is correct
For option ,
When p is true and q is false then p 
~q is true and p 
q is false
Hence, option is incorrect
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