Find the roaster form of the set B = {x : x is a two digit number such that the sum of digits is 7} ?

1
B = {7, 16, 25, 34, 43, 52, 61, 70}
2
B = {16, 25, 34, 43, 52, 61, 70}
3
B = {16, 25, 34, 43, 52, 61}
4
None of these

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