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Question: Answered & Verified by Expert
Let and are two mathematical operators. If p pq is not a tautology, then and can be
MathematicsMathematical ReasoningJEE Main
Options:
  • A and respectively
  • B and respectively
  • C and respectively
  • D None of these
Solution:
1066 Upvotes Verified Answer
The correct answer is: and respectively
A ppq is false only if p is false and pq is false which is never possible simultaneously. Hence, ppq is a tautology
C ppq is false only if p is true and pq is false which is never possible simultaneously. Hence, ppq is a tautology
B ppq is false only if p is true & pq is false which is possible when p is true & q is false. Hence, ppq is not a tautology

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