I'm fishing traditionally, with worms, and I want to catch 1 two to 4 two carp, I don't know Iseni, Marusei and Izu.

Iseni and Izu are both fine, Marusei is for aggressive fish with teeth, and it's a bit tricky to remove the hook. If you're an Izini, then choose a size 5, if you're an Izu, a size 4 will do. I personally recommend that you choose a brook hook, with a thin hook strip, easy for the fish to inhale, a size 3 brook hook is more than enough to catch the size of the fish that you're talking about, and a size 2 will do as well.