If R is a relation A -> B, where A = {1, 2, 3, 4}, B = {1, 3, 5} and (a, b)∈R if a < b then R o R - 1 is
1
{(1, 3), (1, 5), (2, 3) , (2, 5), (3, 5), (4, 5)}
2
{(3, 1), (5, 1), (3, 2), (5, 2), (5, 3), (5, 4)}
3
{(3, 3), (3, 5), (5, 3), (5, 5)}
4
{(3, 3), (3, 4), (3, 5)}