C-02-Q046mediumsingle_mcqA⊆BA \subseteq BA⊆B এবং B⊆AB \subseteq AB⊆A হলে—aA=BA = BA=BbA≠BA \neq BA=BcA∩B=∅A \cap B = \emptysetA∩B=∅dA⊂BA \subset BA⊂B