[ubuntu] About the version of VBoxGuestAddition to be used

Hi all,

Host - Ubuntu 16.04 desktop
Guest - Ubuntu 18.04 desktop
VirtualBox

Please advise which version of Guest Addition is suitable for Ubuntu 18.04?

I have tried following versions;
VBoxGuestAdditions_5.1.2.iso (download on Oracle website)
VBoxGuestAdditions_5.2,2.iso (download on Oracle website)
VBoxGuestAdditions_5.2.10-122088.iso (download on Ubuntu website)

None of them can work for me.

Thanks

Regards
satimis