If A = {x: x ∈ N, x ≤ 7}, B = {x: x is prime, x < 8} and U = {x: x ∈ N, x ≤ 10} where U is the universal set for A and B. Find A' ∪ B' ?

1
{1, 4, 6, 8, 9, 10}
2
{1, 2, 4, 6, 8, 9, 10}
3
{1, 4, 6, 8, 7, 9, 10}
4
None of these

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