Given A={1,2,3},B={3,4,5}A = \{1, 2, 3\}, B = \{3, 4, 5\}A={1,2,3},B={3,4,5}, what is AΔBA \Delta BAΔB (symmetric difference)?
{3}\{3\}{3}
{1,2,3,4,5}\{1, 2, 3, 4, 5\}{1,2,3,4,5}
{1,2}\{1, 2\}{1,2}
{1,2,4,5}\{1, 2, 4, 5\}{1,2,4,5}