C-02-Q121mediumsingle_mcqFor the relation above, DomR=\operatorname{Dom} R =DomR=a{0,1,2,3}\{0, 1, 2, 3\}{0,1,2,3}b{0,1,2}\{0, 1, 2\}{0,1,2}c{1,2,3}\{1, 2, 3\}{1,2,3}d{0,1,2,3,4}\{0, 1, 2, 3, 4\}{0,1,2,3,4}