[TYPO3-install] Which version should I use !?

[joujou]

Hi,
In december 2016, there are 3 branches of Typo3 : 6.2, 7, 8.5.
Which one should be used !?
6.2 and 7 are indicated as stable and LTS.
There's lack of info. 
Will the support of the 6.2 definitely stop in march 2017 ?
Thanks