The symmetric difference of sets A = {1, 2, 3, 4, 5, 6, 7, 8} and B = {1, 3, 5, 6, 7, 8, 9} is

A

{1, 3, 5, 6, 7, 8}

B

{2, 4, 9}

C

{2, 4}

D

{1, 2, 3, 4, 5, 6, 7, 8, 9}