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प्रश्न
Choose the correct alternative:
Which one of the following is not true?
विकल्प
Negation of a statement is the statement itself
If the last column of the truth table contains only T then it is a tautology
If the last column of its truth table contains only F then it is a contradiction
If p and q are any two statements then p ⟷ q is a tautology
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उत्तर
If p and q are any two statements then p ⟷ q is a tautology
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