Question

Which of the of the following sets is a universal set for
the other four sets ?
a) The set of even natural numbers
6) The set of odd natural numbers.
6) The set of
natural numbers
d) The set of negative numbers
lel The set of integers​

Answer 1

The universal set is a set which consists of all the elements or objects, including its own elements.

I think the answer is

The set of natural numbers