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  1. Arithmetic and Logic Unit (ALU)
  2. Control Unit (CU)
  3. Registers
  4. Random Access Memory (RAM)
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1 Answers

Option 3 : Registers

Arithmetic Logic Unit (ALU):

1) It performs all the arithmetic operations like addition (+), multiplication (*), subtraction (-), division (/) on the numerical data directed by the control unit.

2) All the logical operations, like less than (<), greater than (>), equal to (=), not equal to (≠), etc. are also carried out by ALU.

Registers/Memory Unit (MU): 

1) To execute a program, data and instructions need to be stored temporarily.

2) This storage is done in the MU.

3) The data and instructions are retrieved from MU by Control Unit for supplying to ALU when required by the program.

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Control Unit (CU):

1) It controls and coordinates all the operations taking place in the system.

2) It controls the flow of data and information from one unit to the other.

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