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A) 1,5, 6; 2, 3, 4; 7, 8, 9
B) 1,4, 7; 2, 5, 8; 3, 6,9
C) 1, 2, 3; 4, 5, 8; 6, 7,9
D) 1, 3, 5; 2, 4, 8; 6, 7, 9
Correct Answer: A
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