In the design protocol of the critical section problem, each process must ask permission to enter the critical section in …… code; it then executes in the critical section; once it finishes executing in the critical section it enters the …… code. The process then enters the …… code.

Explanation

The standard critical-section protocol structures a process's code into four parts in this cycle: the entry section, where the process requests/acquires permission to enter; the critical section itself; the exit section, where it releases that permission (e.g. clears a flag or signals a semaphore) right after leaving the critical section; and finally the remainder section, covering the rest of the process's code before it loops back to request entry again. Matching this to the blanks — ask permission in the entry section, then after the critical section enter the exit section, then the remainder section — gives entry section, exit section, remainder section, option (ii).