C-02-Q090mediumsingle_mcqA={1,2}A = \{1, 2\}A={1,2}, B={a}B = \{a\}B={a} হলে A×B=?A \times B = ?A×B=?a{(1,a),(2,a)}\{(1, a), (2, a)\}{(1,a),(2,a)}b{(a,1),(a,2)}\{(a, 1), (a, 2)\}{(a