Hence, R is an equivalence relation Further, all the elements of {1, 3, 5, 7} are related to each other, as all the elements
of this subset are odd Similarly, all the elements of the subset {2, 4, 6} are related to
each other, as all of them are even Also, no element of the subset {1, 3, 5, 7} can be
related to any element of {2, 4, 6}, as elements of {1, 3, 5, 7} are odd, while elements
of {2, 4, 6} are even