Please show me how to solve this with clear steps and explainations

Find the lowest cost sum of products realisation of the following incompletely specified function:

$f(x_1,x_2,x_3)={\displaystyle \underset{?}{\overset{?}{}}}m(0,3,4,6)+D(2,5)$

Select one:

a$.f(x_1,x_2,x_3)=(x_3{)}^{\text{'}}+(x_1{)}^{\text{'}}{x}_2$

b$.f(x_1,x_2,x_3)=(x_2{)}^{\text{'}}(x_3{)}^{\text{'}}+x_1(x_3{)}^{\text{'}}+(x_1{)}^{\text{'}}{x}_2{x}_3$

c$.f(x_1,x_2,x_3)=(x_3{)}^{\text{'}}+x1(x_2{)}^{\text{'}}$

d$.f(x_1,x_2,x_3)=(x_3{)}^{\text{'}}+(x_1{)}^{\text{'}}{x}_2+x_1(x_2{)}^{\text{'}}$