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M

Madhu • 11.92K Points
Tutor II

Q.) Which of the following is a sound rule of inference?

(A) q ∧ (p → q) → p
(B) p → (p ∨ q)
(C) q ∨ (p → q) → p
(D) all of above
Correct answer : Option (B) - p → (p ∨ q)

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