Two dice are thrown simultaneously. Let A be the event of getting sum less than 4 and B be the event of getting sum not more than 4. Find set A and not B .

• A. {(1,1), (1,2), (2,1)}
• B. {}
• C. {(1,1), (1,2), (1,3), (2,1), (2,2), (3,1)}
• D. {(1,3), (2,2), (3,1)}