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Que. Let a, b, c, d be propositions. Assume that the equivalences a ↔ (b V-b) and b ↔ c hold. Then the truth value of the formula (a ∧ b) → (a ∧ c) ∨ d) is always
a. True
b. False
c. Same as the truth value of b
d. Same as the truth value of d
Answer:True
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