किसी भी कंप्यूटर सिस्टम का ब्रेन होता है , The brain of any computer system is

Solution

C. Central Processing Unit

Explanation

Control unit or arithmetic logical unit alone can not represent the function of brain to compare with neither does storage unit only. Central Processing Unit is the combination of control, arithmetic logic and memory units thus can be compared with brain that controls the body, processes its functions and remembers.