real guitar, not that hero crap

i've been trying to learn some tabs. its the first time i picked up a guitar so im just tinkering around with it for fun. right now im trying to learn "come as you are" by nirvana and from what i've seen there isn't a consensus on what the actual tab should be.

Main riff:
|-----|-----------------------------|
|-----|-----------------------------|
|-----|-----------------------------|
|-----|-----------------------------|
|-----|-----0---0---------2-----2---|
|-0-0-|-1-2---2---2-2-1-0---0-0---0-|

vs

Main Riff
D|------------------------------------------|
A|------------------------------------------|
F|------------------------------------------|
C|------------------------------------------|
G|--------------0---0----------2------2-0---|
D|----0-0-1--2----2---2-2-1-0----0--0------1|

vs



im leaning towards the last one from what i can hear from the song it matches up best.

any guitar players in here?