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A = {2,3,5,7,11,13,17,19)
B = {1,3,5,7,9,10)
A irisan B (A ∧ B) = {2,5,7}
jadi, jawabannya adalah A. {3,5,7}
semoga bisa membantu ^_^,,,
maaf kalau ada yang salah ^_^,,,