Let A = {1,2,3} and R and S are two relations defined on A, where: R = {(3,2),(2,2),(2,3),(3,1)} S = {(2,3),(2,2),(1,2)} Find RoS. Select one: a. {(2,2),(2,1),(2,3),(1,2),(1,3)} b. {(2,3),(2,2),(1,2)} c. {(3,2),(2,2),(2,3),(3,1)} d. {(3,3),(3,2),(2,3),(2,2)} e. {}