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The advantage of _______ is that it can reference memory without paying the price of having a full memory address in the instruction. 

  1. Direct addressing
  2. Indexed addressing
  3. Register addressing 
  4. Register Indirect addressing  
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The advantage of register indirect addressing is that it can reference memory without paying the price of having a full memory address in the instruction. Direct addressing.

Hence,Option(B)Register Indirect Addressing.

Reference:-http://www.laureateiit.com/projects/bacii2014/projects/coa_anil/addressing_modes.html

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Register indirect addressing means that the location of an operand is held in a register. It is also called indexed addressing or base addressing.Register indirect addressing mode requires three read operations to access an operand.

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