ANSWER
A = {2, 6, 8, 12}
Step-by-step explanation
U = {2, 6, 8, 12, 14, 18, 20, 23, 27}
A n B = {8, 12}
But set A = {2, 6, 8, 12}
Hence, set A = {2, 6, 8, 12}
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