Given U={1,2,3,4,5}U = \{1, 2, 3, 4, 5\}U={1,2,3,4,5} and A={1,2}A = \{1, 2\}A={1,2}. Which set is (A×U)∩(U×A)(A \times U) \cap (U \times A)(A×U)∩(U×A)?
{(1,1),(1,2),(2,1),(2,2)}\{(1, 1), (1, 2), (2, 1), (2, 2)\}{(1,1),(1,2),(2,1),(2,2)}
{(1,1),(2,2)}\{(1, 1), (2, 2)\}{(1,1),(2,2)}
{(1,2),(2,1)}\{(1, 2), (2, 1)\}{(1,2),(2,1)}
{(1,1),(1,2),(2,2)}\{(1, 1), (1, 2), (2, 2)\}{(1,1),(1,2),(2,2)}