For which of the following cases A and B are equivalent?

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For which of the following cases A and B are equivalent?

1. A = {a, b, c,…, z}, B = {1, 2, 3,…, 24}
2. A = {1/3,1/2,3/5}, B = { x : x = n/n+2, n ε N}
3. A = {2, 4, 6}, B = {(2, 4), (4, 6), (2, 6)}
4. A = { x : x = ( n³ - 1 )/ ( n³ + 1) , n ε W, n ≤ 3} , B = { 0,7/9,13/14}

Correct Option: C

NA