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The logical statement [~ (~p ∨ q) ∨ (p ∧ r)] ∧ (~q ∧ r) is equivalent to :

1. (~ p ∧ ~ q) ∧ r
2. (p ∧ ~q) ∨ r
3. (p ∧ r) ∧ ~q
4. ~p ∧ r

Correct answer: (p ∧ r) ∧ ~q

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