Question:

Which of the following two sets are equal?

A.

a = {1, 2} and b = {1}

B.

a = {1, 2} and b = {1, 2, 3}

C.

a = {1, 2, 3} and b = {2, 1, 3}

D.

a = {1, 2, 4} and b = {1, 2, 3}

Answer» c. a = {1, 2, 3} and b = {2, 1, 3}