Now it is clear that there is no explicit version showing
option list in the recognized desktop entry keys
but they do have other field(s) there which can be used
to hold the version information.
One such field is GenericName
This field gets listed as Description
GNOME desktop environment.
So, if I add version info in this field as follows:
It gets shown on the right click as follows:
So, in a nutshell, we have the option to store our executable
where normal Linux executables are stored, and
then create its shortcut on the desktop or somewhere else.
Then we will be able to right click this shortcut and get
the version information.