Step 1: Definition of "MSU":
"MSU" isn't a standard hardware term like "CPU" or "RAM." It likely means either "Main System Unit" or "Memory Storage Unit." Considering the component options, "MSU" probably refers to the entire computer system.
Step 2: Component Analysis:
Assuming "MSU" is the complete computer system:
(A) Monitor: An essential output device for user interaction. Part of a standard computer setup.
(B) Keyboard: An essential input device for user interaction. Part of a standard computer setup.
(C) Motherboard: The primary circuit board, connecting all internal components. Part of the system.
(D) CPU (Central Processing Unit): The computer's "brain," located on the motherboard. Part of the system.
If "MSU" meant the "Main System Unit" (computer case and internal components), only the Motherboard and CPU would be included, and the Monitor and Keyboard would be external. However, this option isn't available.
The most logical choice, given the options, is the one encompassing a full, functional system: all listed components. Option (3) includes (A), (B), (C), and (D), representing internal processing elements and input/output devices. This suggests "MSU" refers to the whole system.
Step 3: Conclusion:
Due to the term "MSU"'s ambiguity and the provided options, the most probable interpretation is the entire computer system. Therefore, all listed components—Monitor, Keyboard, Motherboard, and CPU—are considered part of it.