Which of these sets is finite?

{1, 2, 3, ...., 999, 1000}

{1, 2, 3, ....}

{x | x is given}

None of these

A finite set has a limited number of elements.

{1, 2, 3, ...., 999, 1000} - This set has a specific starting and ending point (1 to 1000), making it finite.