This is normal, VMware has not implemented a dedicated selection option for 2012 R2 as they don't need to differentiate between the two versions, you can just go with the plain 2012 option. See this article:
VMware KB: Microsoft Windows Server 2012 R2 guest operating system option is not available
You're running the completely unpatched, old ESXi 5.0 GA version from 2011 that is full of issues and security holes. 2012 R2 is also only supported from 5.0 U2 onwards:
VMware Compatibility Guide: Guest/Host Search
Upgrade to a recent ESXi version (preferably a recent 5.5 or 6.0 version) before you try to install 2012 R2 guests.
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