Which of the following statement regarding interrupt is incorrect? (a) if no interrupts are pending, the processor proceeds to the next fetch stage. (b) interrupt usually involves some overhead. (c) in handling multiple interrupts, the processor cannot disable other interrupts while an interrupt is being processed. (d) when the processor transfers control to the interrupt service routine, it needs to save the program status word and the location of next instruction to be executed. (e) none of the above.