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If A = { x: x in N, is a factor of 6 } ...

If A = `{ x: x in N, is a factor of 6 }` and B = `{ x in N : x is a factor of 8 }` , then B-A is equal to

A

{4,8}

B

{2,4}

C

{1,2}

D

none of these

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A
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