1. Unlike something, something is/does something
Aと違って、Bは 〜
例:
Unlike Americans, Japanese people take off their shoes before entering their house.
Like/dislike (動詞) 好む/嫌う
Alike (形容詞) 似てる。 E.g. These two people look alike.
なので、1番の答えは Unlike です :)
