__ is not located I in the system unit Select one: a. FAN b. CD c. CPU d. ROM

The correct answer is b. CD.<br /><br />The CD (compact disc) is not located in the system unit. It is an optical disc that is typically read or written by a CD drive, which is an external device connected to the computer. The system unit, also known as the computer case or tower, contains the main components of a computer, such as the motherboard, CPU, memory, storage drives, power supply, and expansion cards. The FAN (fan), CPU, and ROM (read-only memory) are all components that are typically found inside the system unit.