Question

If A ∆ B= {1, 2, 3, 5, 7, 8, 9, 11, 13} and B = {4,
5, 6, 8, 11, 13}, then find A.
(a) {1, 2, 3, 7,9}
(b) {1, 2, 3, 4, 5, 6, 7, 9}
(c) {1, 2, 3, 4, 6, 7,9}
(d){1, 2, 3, 4, 8, 11}​

Answer 1

I am sorry I am not of yours and it's my don't know the answer