What are the minimum component that comprised a template imported by Oracle VM manager?

One virtual disk image (.img) file.

A configuration file (.vmx) and virtual disk image (.vmdk) file.

A virtual machine configuration file (vm.conf), a metastate file (.vix), a BIOS file (.nvram) and one virtual disk image (.img) file.

A virtual machine configuration file (vm.conf) and at least one virtual disk (.img) file.

One disk image (.img) containing the root file system and another disk (.img) containing the boot file system.