Which of the following are not likely to be found on a PC main circuit board

The correct answer is D. LCD clocks.

RAM chips, microprocessor chips, and ROM chips are all essential components of a PC main circuit board. RAM chips store data that is currently being used by the computer, while ROM chips store data that is permanently stored on the computer. The microprocessor chip is the “brain” of the computer and controls all of its operations.

An LCD clock is not an essential component of a PC main circuit board. It is a device that displays the time on the computer screen. While it is a useful feature, it is not necessary for the computer to function.

Here is a more detailed explanation of each option:

• RAM chips: RAM chips are used to store data that is currently being used by the computer. This data can include programs, files, and even the operating system. RAM chips are volatile, which means that they lose their data when the computer is turned off.
• Microprocessor chips: The microprocessor chip is the “brain” of the computer. It controls all of the computer’s operations, including processing data, running programs, and communicating with other devices.
• ROM chips: ROM chips store data that is permanently stored on the computer. This data can include the computer’s BIOS (basic input/output system), which is a set of instructions that the computer uses to start up. ROM chips are non-volatile, which means that they do not lose their data when the computer is turned off.
• LCD clocks: LCD clocks are devices that display the time on the computer screen. They are a useful feature, but they are not necessary for the computer to function.