Regarding the subroutines, see the following sequence of tasks to be performed:
A. Turn on the interrupt facility on.
B. Service the device whose flag is set.
C. Save the contents of processor registers.
D. Check which flag is set.
E. Restore the contents of processor registers.
Choose the correct answer from the options given below :
1
A, D, C, B, E
2
D, A, B, C, E
3
C, D, B, E, A
4
B, D, A, C, E