Explanation:

The Central Processing Unit (CPU) is primarily composed of the Control Unit (CU) and the Arithmetic Logic Unit (ALU). The Control Unit is responsible for managing and coordinating operations, while the ALU performs arithmetic and logical operations. The question mentions "Control Memory" which is often part of the Control Unit (e.g., for microcode), and then asks for another type of "Units". The most fitting answer is "Arithmetic/Logic Units" (ALU), which together with the Control Unit forms the core of the CPU. Option (a) 'Microprocessor' is another name for the CPU itself. Options (c) 'Output', (d) 'ROM', and (e) 'Input' are external components or memory types, not core functional units of the CPU.