Reading the textbook, pp$.203$ff$.$ and pp$.226$ff$.,$ which one of the followings is the truest one?

Stating that "All non$-$B are non$-$A$"$ is in truth value identical with "Some non$-$B are not non$-$A$,"$ because:

a$)$ Conversion works with A$-$ and O$-$propositions, while contraposition works with E$-$ and O$-$propositions.

b$)$ Contraposition works with A$-$ and O$-$propositions.

c$)$ Contraposition works with E$-$ and I$-$propositions.

d$)$ None of the above