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Which of the following is correct? (a) A B |= (A B). (b) (A B) |= A B. (c) (A B) C |= (A C)

Which of the following is correct? (a) A B |= (A B). (b) (A B) |= A B. (c) (A B) C |= (A C) (B C). (d) (A B) (C D E) |= (A B) (D E). (e) (A B) (A B) is satisfiable.

(this is a topic in Artificial Intelligence)

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