Question

Which of the following does not represent the set of even integers from 1 to 20?

{even integers from 1 to 20}
{2, 4, 6, 8, 10, 12, 14, 16, 18, 20}
{2, 4, 6, 8, ...}
{2, 4, 6, ..., 16, 18, 20 }