The correct answer is MHz.Speed of Processor?Processor speed is relative to the clock speed which is measured in units of cycles per second.CPUs run at rates of millions and billions of Hertz, megahertz(MHz) and gigahertz(GHz).A clock speed of 3.5 GHz to 4.0GHz is generally considered a good processor speed.Additional InformationProcessor(CPU)A CPU is also called a central processor, main processor, or just processor, is the electronic circuitry that executing instructions comprising a computer program.The CPU performs basic arithmetic, logic, controlling, and input/output operations specified by the instructions in the program.The fundamental operation of most CPU's regardless of the physical form they take is to execute a sequence of stored instructions called a program. Instructions cycle in Processor(CPU)All CPU's follows the following steps in order to complete their operations:Fetch: The first step, involves retrieving instructions from the program memory.Decode: The instruction that the CPU fetches from the memory determines what the CPU will do, which is decoded by the instructor decoder.Execute: In this step, all the desired functions are performed as per the instructions decoded.