C-02-Q016mediumsingle_mcqC={x:xC = \{x : xC={x:x is a positive integer and x2<18}x^2 < 18\}x2<18} in roster form is—a{1,2,3}\{1, 2, 3\}{1,2,3}b{1,2,3,4}\{1, 2, 3, 4\}{1,2,3,4}c