OEL version need ...

 Folk,
Requirment :

1. Install 12.1.1 so till come with 11.1.0.7 here which version of OEL support

2.then upgrade 11.1.0.7 to 11.2..03 so here which version will support ?

Going to install the 12.1.1 on OEL.

i need vernsion of OEL max version like OEL 5.9 6.4 ...

i cant use 6.4 since 12.1.1 seeded with DB 11.1.0.7 which  wont supported  but applicaiton 12.1.1 will support for same version of OS

mens OEL6.4 will support 11.1.0.7 but it will support 12.1.1 what a beauty .......two node installation 

i want to do upgrade to 11.1.0.7 to 11.2.0.3 aftet install 12.1.1

so pls suggestion whch version fit for this requirement .

even i saw many note ids getting confusion