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Let ⊕ and ⊗ are two mathematical operators. If p ⊕ p ⊗ q is not a tautology, then ⊕ and ⊗ can be

Options

  1. A∨ and ⇒ respectively
  2. B⇒ and ∧ respectively
  3. C⇒ and ∨ respectively
  4. DNone of these

Correct answer

B. ⇒ and ∧ respectively

Step-by-step solution

A p ∨ p ⇒ q is false only if p is false and p ⇒ q is false which is never possible simultaneously. Hence, p ∨ p ⇒ q is a tautology C p ⇒ p ∨ q is false only if p is true and p ∨ q is false which is never possible simultaneously. Hence, p ⇒ p ∨ q is a tautology B p ⇒ p ∧ q is false only if p is true & p ∧ q is false which is possible when p is true & q is false. Hence, p ⇒ p ∧ q is not a tautology

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