Questions: The contains the central electronic components of the computer.

The answer is the second one (B): motherboard.

Explanation for each option: A. Input unit - This is incorrect. The input unit is responsible for taking input from external devices like keyboards and mice, but it does not contain the central electronic components of the computer. B. Motherboard - This is correct. The motherboard is the main circuit board of the computer and contains the central electronic components, including the CPU, memory, and other essential circuitry. C. Arithmetic/logic unit - This is incorrect. The arithmetic/logic unit (ALU) is a part of the CPU that performs arithmetic and logical operations, but it is not the component that contains the central electronic components of the computer. D. Peripheral unit - This is incorrect. Peripheral units are external devices like printers, scanners, and external drives, which are not central to the computer's electronic components.

Summary: The motherboard contains the central electronic components of the computer, making option B the correct answer.