MySQL Download Question

I want to download MySQL and use it on CentOS. But I found the downloading selection menu on the MySQL website is confusing. Which one should I choose? See the attached image.

Thanks.

The first looks like it is for RHEL5 and the second for RHEL6 (and clones) - judging by the filenames for the downloads:

StackExchange Database Administrators Q#7246, answer score: 4