Which of the following two sets are disjoint?

• A. {1, 3, 5} and {1, 3, 6}
• B. {1, 2, 3} and {1, 2, 3}
• C. {1, 3, 5} and {2, 3, 4}
• D. {1, 3, 5} and {2, 4, 6}