Consider the Boolean function $F(W,x,Y,Z)={\displaystyle \underset{?}{\overset{?}{}}}(0,1,2,4,6,10,12)$ which has the don't care conditions $D(W,x,Y,Z)={\displaystyle \underset{?}{\overset{?}{}}}(7,13,14,15),$ the minimum sum$-$of$-$products $(SOP)$ expression of $F$ is:

a$.F(W,x,Y,Z)=W^{\text{'}}{x}^{\text{'}}{Y}^{\text{'}}+Wx+x{Z}^{\text{'}}+Y{Z}^{\text{'}}$

b$.F(W,x,Y,Z)=W^{\text{'}}{x}^{\text{'}}{Y}^{\text{'}}+W^{\text{'}}{Z}^{\text{'}}+Y{Z}^{\text{'}}$

C$.F(W,x,Y,Z)=W^{\text{'}}{x}^{\text{'}}{Y}^{\text{'}}+W^{\text{'}}{Z}^{\text{'}}+x{Z}^{\text{'}}$

d$.F(W,x,Y,Z)=W^{\text{'}}{x}^{\text{'}}{Y}^{\text{'}}+x{Z}^{\text{'}}+Y{Z}^{\text{'}}$

e$.F(W,x,Y,Z)=W^{\text{'}}{x}^{\text{'}}{Y}^{\text{'}}+W^{\text{'}}{Z}^{\text{'}}+x{Z}^{\text{'}}+Y{Z}^{\text{'}}$