Let the contents of the accumulator and register B be 00000100

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Let the contents of the accumulator and register B be 00000100 and 01000000 respectively before execution of instruction SUB B. the contents of the accumulator after the execution of this instruction will be—

1. 00000100
2. 01000000
3. 11000100
4. 01001000

Correct Option: C

Before execution
Sub
Hence alternative (C) is the correct answer.