Which of the following food items cannot be caramelized?

the explanation should have been about why the cucumbers can't be caramelised

diamondgeezer11, It says specifically pickled cucumbers. I'm no chemist but I suspect the pickling would inhibit caramelization.

diamondgeezer11, Pickled cucumbers cannot be caramelized because they are preserved in brine, which prevents them from being cooked: Brine Cucumbers are pickled by immersing them in brine, which is a saltwater solution that extracts moisture from the cucumbers. The salt in the brine also inhibits the growth of harmful bacteria. (perhaps other reasons too)

was anyone else tasting this description as you were reading it? because I was!