Solution

IPC means Inter Process Communication. It helps cooperating processes communicate and can provide computational speedup.

So,

a → II

Demand Paging is a technique used in Virtual Memory.

So,

b → IV

Banker's Algorithm is used for safe Resource Allocation and deadlock avoidance.

So,

c → I

PCB means Process Control Block. It is also related to task control information.

So,

d → III

Correct matching:

a-II, b-IV, c-I, d-III