Which of the following words has or have both a prefix and suffix you unreliable II unremarkable III unaccountable?

Here's why:

* Prefix: "un-" means "not"

* Suffix: "-able" means "capable of"

Let's look at the other options:

* I. unreliable: This word has a prefix "un-" but no suffix.

* III. unaccountable: This word also has a prefix "un-" but no suffix.