1. Р (х, В, в) and P(A, y, z) 2. Q (Z, b) and Q(b, Y) 3. P (a, b, c) and Q(X, Y, z) 4. Р (X, а, X) and P(a, X, х) Which 2 of the 4 pairs above can be unified? A:1 and 2 B:2 and 3 C:3 and 4 D:1 and 3 E:2 and 4 F:1 and 4 Submit Answer Which of the following would fail because of an occurs check? A: p(A, B) and p(A, b) B: p(A, B) and p(f(a), b) C: p(f(A), B) and p(f(a), b) D: p(f(A,B) and p(f(a),b) Submit Answer

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