Answer:
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}
Explanation:
Solution:
when two sets have the same and equal elements, they are called equal sets.
Consider option C
A = {1,2,3} and B = {2,1,3}. We can see that the elements are same in A and B.
Hence option C is the answer.
Hope i helped ;›