First fork of Bitcoin? Help!

[whoopsiodd]

Hello everyone, I'm totally confused.

If the question sounds like "the first fork of bitcoin," what's the answer?
1) Namecoin? But the coin is made on the basis of the block, is this considered an fork?
2) Litecoin? But why is it fork? The coin is simply made on the basis of a block cue
3) Bitcoin XT? But then I realized there was no token. And this fork by the cue ball
4) Bitcoin Cash? Yes, the first, but it is hardfork (and the question fork)

Help the girl figure it out! 
It is in the formulation of "the first fork of bitcoin," which answer will be correct?

[franky1]

the term 'fork' has been over used and doesnt actually explain the difference between just a code copy/paste to create a new 0 history altcoin, or a divergent of the block history after a certain block number

anyway there have been many 'forks' of bitcoin. hundreds infact
XT was not a 'chain' fork because it was just a wallet software working on the network. but was a code fork because the code was similar

bitcoin cash was a 'chain' fork because it was forced to become an altcoin. due to the whole segwit bait and switch drama

before these there were many more, hundreds more.
the main first that retained the block history of bitcoin(prior to the fork) was called clams (a 'chain fork)

though there were also hundreds of others that just script-kiddy copied the code, but started again from block 1

[Aura]

Namecoin was the first fork of the source-code, even Satoshi himself was involved. Litecoin was also a fork of the Bitcoin source code, it's almost identical but has some different characteristics like the scrypt algorithm, decreased blocktime and increased supply. Bitcoin XT seems to be the first official hard-fork of Bitcoin, but it didn't succeed so they proposed Bitcoin Classic. Now there's Bitcoin cash with basically the same ideal, but lead by some money junkies  .

[whoopsiodd]

the term 'fork' has been over used and doesnt actually explain the difference between just a code copy/paste to create a new 0 history altcoin, or a divergent of the block history after a certain block number

anyway there have been many 'forks' of bitcoin. hundreds infact
XT was not a 'chain' fork because it was just a wallet software working on the network. but was a code fork because the code was similar

bitcoin cash was a 'chain' fork because it was forced to become an altcoin. due to the whole segwit bait and switch drama

before these there were many more, hundreds more.
the main first that retained the block history of bitcoin(prior to the fork) was called clams (a 'chain fork)

though there were also hundreds of others that just script-kiddy copied the code, but started again from block 1

so what answer is more like the truth? And if the question "Which crypto currency is the first fork of bitcoin ?"