C-02-Q068mediumsingle_mcqA={1,2,3}A = \{1, 2, 3\}A={1,2,3}, B={2,3,4}B = \{2, 3, 4\}B={2,3,4} হলে A∪B=?A \cup B = ?A∪B=?a{2,3}\{2, 3\}{2,3}b{1,4}\{1, 4\}{1,4}c{1,2,3,4}\{1, 2, 3, 4\}