C-02-Q118mediumsingle_mcqFor S={(2,1),(2,2),(3,2),(4,5)}S = \{(2, 1), (2, 2), (3, 2), (4, 5)\}S={(2,1),(2,2),(3,2),(4,5)}, DomS=\operatorname{Dom} S =DomS=a{1,2,5}\{1, 2, 5\}{1,2,5}b{2,3,4}\{2, 3, 4\}{2,3,4}c