Gate 2007 pyq DIGITAL | The following expression was to be realized using 2-input AND and OR gates.
The following expression was to be realized using 2-input AND and OR gates. However, during the fabrication all 2-input AND gates were mistakenly substituted by 2-input NAND gates.
(a.b).c + (a’.c).d + (b.c).d + a. d
What is the function finally realized ?
(A) 1
(B) a’ + b’ + c’ + d’
(C) a’ + b + c’ + d’
(D) a’ + b’ + c + d’