In linux operating system, what file extension is used forexecutable files?

No particular file extension is present for the executable files in Linux

Explanation: In Linux operating system, there is no particular extension for identifying the executable file. The way of checking if a file is executable or not is by knowing about the permission level the file is having .Linux is different kind of operating system so the file's end notation cannot describe about the extension of the file like the Windows operating system

answer(a) occurs after your prediction;