Relations may exist between?*objects of the unique set.objects of the universal set.between objects of two or more sets.objects of the distinct set.

Relations can exist between:

1. Objects of the unique set: A unique set is a set with no duplicate elements. In this case, relations can exist between the different elements within this set. For example, if we have a unique set of numbers {1, 2, 3}, a relation could be that each number is greater than the one before it.

2. Objects of the universal set: A universal set is the set of all possible elements in a particular context or universe. Relations can exist between any two or more elements within this set. For example, in the universal set of all animals, a relation could be that some animals are predators of others.

3. Between objects of two or more sets: Relations can also exist between elements of different sets. For example, if we have a set of fruits and a set of colors, a relation could be that certain fruits are certain colors.

4. Objects of the distinct set: A distinct set is a set where no two elements are the same. Similar to a unique set, relations can exist between the different elements within this set. For example, if we have a distinct set of shapes {circle, square, triangle}, a relation could be that each shape has a different number of sides.