ANS:C - Broadband channel

Whenever there is an interrupt to the sequential instruction execution then the processors loads its program counter with the starting location of a routine which contains code to execute the interrupt. This location where the part of code is stored is called interrupt service routine (ISR). The processor executes the ISR and returns to the next instruction of the main program.

A section of code (memory pointer) to which control is transferred when a processor is interrupted.

An instruction that transfers program control to one or more possible paths is known as system software.

Answer is : B.