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प्रश्न
Which of the following statements is false?
विकल्प
`p ∧ (∼ p)` is contradiction
`(p → q) ↔ (∼ q → ∼ p)` is a contradiction
`~ (∼ p) ↔ p` is a tautology
`[(p → q) ∧ (∼ q)] → (∼ p)` is a tautology
उत्तर
`bb((p → q) ↔ (∼ q → ∼ p))` is a contradiction
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