6.Which combination of the following features will suffice to characterize an OS as a multi programmed OS ? (i) More than one program may be loaded into main memory at the same time for execution. (ii) If a program waits for certain events such as I/O, another program is immediately scheduled for execution. (iii) If the execution of a program terminates, another program is immediately scheduled for execution.
Options: (A)(i) only (B) (ii) and (iii) (C) (i) and (iii) (D) (i), (ii) and (iii). 3