Q. If U = {1, 2, 3, . . . 10 } and S = { 4, 5, 6, 7, 8 }, then S ' =

• (A) { 9, 10 }
• (B) {1, 2, 3 }
• (C) {1, 2, 3 9 }
• (D) {1, 2, 3 9 10 }