Which of the following choices is not a cue for a contrast or antonym context clue?

A) On the other hand

B) In other words

C) However

D) Unlike

The answer is B, in other words.

Think of it this way: if you were to introduce an idea, and then say "on the other hand" it's logical to assume that you are about to introduce a new idea that is not similar to your original.

The same is true of keywords "unlike" and "however".

But, if you're describing something "in other words", you're saying the same idea, just communicating it a different way.