= Consider the equivalence relation R defined on the set S = {1, 2, 3, 4, 5}, which partitions S into the following disjoint sets: {1, 2}, {3}, {4, 5}. What is R? None R = {(1,2), (2,1), (4,5), (5,4)} R = {(1,2), (2,1), (1,1), (2,2), (4,5), (4,4), (5,5)} = R = {(1,1), (2,2), (3,3), (4,4), (5,5), (1,2), (2,1), (4,5), (5,4)} R = {(1,1), (2,2), (3,3), (4,4), (5,5), (2,1),(1,2)} O R = {(1,1), (2,2), (3,3), (4,4), (5,5), (1,2), (4,5)}