Which is the best option for High Scalable Websites or Enterprise Applications:
If any other available let me know.
See ORMBattle.NET - high performance is usually related to scalability. Of course, mainly indirectly: high performance is related to code perfection in general; being really fast implies deep understanding of all the background issues and the ability to deal with them.
Note (or disclaimer): I'm one of persons related to creation of ORMBattle.NET, as well as one of DataObjects.Net authors.