Explanation : In UNIX, processes that have finished execution but have not yet had their status collected are known as Zombie processes. A process whose parent process no more exists i.e. either finished or terminated without waiting for its child process to terminate is called an Orphan process. Sleeping process which takes a time value as a parameter that specifies the minimum amount of time in which process set to sleep before resuming execution Stopped processes which stopped their execution. So, option (C) is correct.