Which of the following sets have the completeness axiom property ℤ,ℚ,ℝ∖ℚ

To show that ℚ orℝ∖ℚ does not satisfy the least upper bound property, you need to find a subset of ℚ,ℝ∖ℚ which is bounded above, but has no least upper bound in ℚ,ℝ∖ℚ