A {1, 2, 3, 6, 7, 14, 21, 42}
B {1, 3, 6, 7, 14, 42}
C {1, 2, 3, 6, 14, 42}
D {1, 2, 3, 6, 8, 14, 21, 42}
Correct Answer: Option A
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