.NET Framework versions on Windows server 2016 Standard

I have a Windows server 2016 Standard.

In Add roles and features wizard it shows .NET framework 4.6 and ASP.NET 4.6 installed.

But in registry HKEY_LOCAL_MACHINE\Software\microsoft\NET Framework Setup it shows  .net framework 4.0 is installed.

In Control panel : View installed updates it does not show .NET Framework 4.6

If .NET Framework is not installed why is it showing installed in roles and features  for WEB Server .

Is .NET Framework 4.6 installed  or NOT ?  What version of .NET Framework comes by default in Windows server 2016 standard ?

If I install NET Framework now do I need to uninstall .NET Framework 4.0 

Thanks !