The most simplified form of the Boolean function X(A, B, C, D) = Σ(7, 8, 9, 10, 11, 12, 13, 14, 15) is ?
- A. A + A'BCD
- B. AB + CD
- C. A + BCD
- D. ABC + D
Answer: C. A + BCD
Explanation: K-map simplification. Terms 8-15 cover A=1. Term 7 is 0111 (A'BCD). A + A'BCD = (A+A')(A+BCD) = A + BCD.