Which of the following are considered as disjoint sets?

• X = {3, 2, 5, 9} Y = {2, 5, 3, 9}
• A = {1, 2, 3, 6} B = {10, 4, 8, 9, 7} Correct
• X = {1, 2, 10, 9} Y = {1, 2, 11, 10, 9}
• A = {1, 5,7, 10, 12} B = {1, 5, 7, 9}