When it comes to fighting, there is a movie quote which I think tells the rules for becoming a great fighter, "The only rules that really matter are these: what a man can do and what a man can't do" those in prison have proven that they will do whatever it takes to get what they want. If you are not willing to will at all cost you will always lose to someone who will, regardless of your training.

If I were you I'd stop putting yourself into a position to get into jail so you don't have to worry about this

In prison you won't be fighting one person, hell you may not even be fighting, you'll either be surprise stabbed or you'll be ambushed by multiple assailants. Prisoners aren't in the business of setting up fair fights. They send messages if you cross them.

So to answer your question, no they likely don't know any form of martial arts, but that's irrelevant since whatever you may know, will not work on them.

Some probably are, others would rely on strategy. As for studying 4 different martial arts in one year...i doubt there would be much of a solid foundation in any of them. My advice, don't do stupid crap that will land you there.

Nobody can give a blanket answer

they are street fighters ..... kayukeeennnn!!!!!!

Or can a kid with just 1 year experience in MMA, karate, jiu jitsu, wing chun etc... beat the average thugs jail?

I'm asking just in case this unfair country wants to **** me again, and send me back to jail. I want to at least be well respected in the jungle.