If A={1,2}A = \{1, 2\}A={1,2} and B={1,2,3}B = \{1, 2, 3\}B={1,2,3}, which of the following is true?
A⊂BA \subset BA⊂B
B⊂AB \subset AB⊂A
A=BA = BA=B
A∩B=∅A \cap B = \emptysetA∩B=∅